Hyannis Water (MA) Water Quality

Hyannis Water is a large public water system in EPA region 1 that provides tap water for the 02601 zip codes. It has 19 facilities where the water supply was tested for 75 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 1.975 µg/L. The maximum reported level of Manganese was 121 µg/L. There were 2 contamintants found in the Hyannis Water water supply at levels that were above the minimum reporting level.

Table of Contents
Contaminants
Facilities
FAQ

Contaminants

Jump To Contaminant
1,1-dichloroethane (14)
1,2,3-trichloropropane (14)
1,3-butadiene (14)
1,4-dioxane (14)
1-butanol (6)
11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (6)
1H,1H,2H,2H-perfluorodecane sulfonic acid (6)
1H,1H,2H,2H-perfluorohexane sulfonic acid (6)
1H,1H,2H,2H-perfluorooctane sulfonic acid (6)
2,4-dinitrotoluene (18)
2,6-dinitrotoluene (18)
2-methoxyethanol (6)
2-propen-1-ol (Allyl Alcohol) (6)
4,4'-dichloro dichlorophenyl ethylene (DDE) (18)
4,8-dioxa-3H-perfluorononanoic acid (6)
9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (6)
alpha-hexachlorocyclohexane (6)
bromochloromethane (Halon 1011) (14)
bromomethane (14)
Butylated Hydroxyanisole (6)
chlorate (16)
chlorodifluoromethane (HCFC-22) (14)
chloromethane (14)
chlorpyrifos (6)
chromium (16)
chromium-6 (16)
cobalt (16)
dimethipin (6)
dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (18)
ethoprop (6)
Germanium (6)
HAA5 (five regulated haloacetic acids) (8)
HAA6Br (six brominated haloacetic acids) (8)
HAA9 (nine haloacetic acids) (8)
hexafluoropropylene oxide dimer acid (GenX) (6)
lithium (6)
Manganese (6)
methyl-tertiary-butyl-ether (MTBE) (18)
molinate (18)
molybdenum (16)
N-ethyl perfluorooctanesulfonamidoacetic acid (6)
N-methyl perfluorooctanesulfonamidoacetic acid (6)
nitrobenzene (18)
nonafluoro-3,6-dioxaheptanoic acid (6)
o-toluidine (6)
oxyfluorfen (6)
perchlorate (18)
perfluoro(2-ethoxyethane)sulfonic acid (6)
perfluoro-3-methoxypropanoic acid (6)
perfluoro-4-methoxybutanoic acid (6)
perfluorobutanesulfonic acid (20)
perfluorobutanoic acid (6)
perfluorodecanoic acid (6)
perfluorododecanoic acid (6)
perfluoroheptanesulfonic acid (6)
perfluoroheptanoic acid (20)
perfluorohexanesulfonic acid (20)
perfluorohexanoic acid (6)
perfluorononanoic acid (20)
perfluorooctanesulfonic acid (20)
perfluorooctanoic acid (20)
perfluoropentanesulfonic acid (6)
perfluoropentanoic acid (6)
perfluorotetradecanoic acid (6)
perfluorotridecanoic acid (6)
perfluoroundecanoic acid (6)
profenofos (6)
quinoline (6)
s-ethyl-dipropylthiocarbamate (EPTC) (18)
strontium (16)
tebuconazole (6)
terbacil (18)
Total Permethrin (6)
tribufos (6)
vanadium (16)

1,1-dichloroethane (14)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

0.034 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.004 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: ?

Contaminant Details

1,2,3-trichloropropane (14)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: ?

Contaminant Details

1,3-butadiene (14)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.1 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.1 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.1 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.1 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.1 µg/L
Reference Level: ?

Contaminant Details

1,4-dioxane (14)

Maher 1,2,3

Maher TP ℹ️

0.37 µg/L

⚠️ Exceeds Reporting Level of 0.07 µg/L by 0.3 µg/L

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

0.19 µg/L

⚠️ Exceeds Reporting Level of 0.07 µg/L by 0.12 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.15 µg/L

⚠️ Exceeds Reporting Level of 0.07 µg/L by 0.08 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.07 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.07 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.07 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.07 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

0.26 µg/L

⚠️ Exceeds Reporting Level of 0.07 µg/L by 0.19 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.2 µg/L

⚠️ Exceeds Reporting Level of 0.07 µg/L by 0.13 µg/L

11/20/2013

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

0.13 µg/L

⚠️ Exceeds Reporting Level of 0.07 µg/L by 0.06 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.07 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.07 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.07 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.07 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.07 µg/L
Reference Level: ?

Contaminant Details

1-butanol (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<2 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<2 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<2 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<2 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<2 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<2 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 2 µg/L
Reference Level: 700 µg/L

Contaminant Details

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.005 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.005 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.005 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

1H,1H,2H,2H-perfluorodecane sulfonic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.005 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.005 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.005 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

1H,1H,2H,2H-perfluorohexane sulfonic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

1H,1H,2H,2H-perfluorooctane sulfonic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.005 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.005 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.005 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

2,4-dinitrotoluene (18)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

Maher 1,2,3

Maher TP ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

Maher 1,2,3

Maher TP ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

Minimum Reporting Level: 2 µg/L
Reference Level: ?

Contaminant Details

2,6-dinitrotoluene (18)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

Maher 1,2,3

Maher TP ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

Maher 1,2,3

Maher TP ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

Minimum Reporting Level: 2 µg/L
Reference Level: ?

Contaminant Details

2-methoxyethanol (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.4 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.4 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.4 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.4 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.4 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.4 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.4 µg/L
Reference Level: 21 µg/L

Contaminant Details

2-propen-1-ol (Allyl Alcohol) (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.5 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.5 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.5 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.5 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.5 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.5 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.5 µg/L
Reference Level: 35 µg/L

Contaminant Details

4,4'-dichloro dichlorophenyl ethylene (DDE) (18)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.8 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.8 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<0.8 µg/L

Below Reporting Level

12/18/2002

22 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<0.8 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.8 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<0.8 µg/L

Below Reporting Level

12/18/2002

22 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<0.8 µg/L

Below Reporting Level

12/18/2002

22 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<0.8 µg/L

Below Reporting Level

12/18/2002

22 years ago

Maher 1,2,3

Maher TP ℹ️

<0.8 µg/L

Below Reporting Level

12/18/2002

22 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.8 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.8 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<0.8 µg/L

Below Reporting Level

6/26/2002

23 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<0.8 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.8 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<0.8 µg/L

Below Reporting Level

6/26/2002

23 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<0.8 µg/L

Below Reporting Level

6/26/2002

23 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<0.8 µg/L

Below Reporting Level

6/26/2002

23 years ago

Maher 1,2,3

Maher TP ℹ️

<0.8 µg/L

Below Reporting Level

6/26/2002

23 years ago

Minimum Reporting Level: 0.8 µg/L
Reference Level: ?

Contaminant Details

4,8-dioxa-3H-perfluorononanoic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.002 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.002 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.002 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.002 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.002 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.002 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.002 µg/L
Reference Level: ?

Contaminant Details

alpha-hexachlorocyclohexane (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.01 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.01 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.01 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.01 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.01 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.01 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.01 µg/L
Reference Level: 0.006 µg/L

Contaminant Details

bromochloromethane (Halon 1011) (14)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.06 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.06 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.06 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.06 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.06 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.06 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.06 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.06 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.06 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.06 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.06 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.06 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.06 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.06 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.06 µg/L
Reference Level: ?

Contaminant Details

bromomethane (14)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.2 µg/L
Reference Level: ?

Contaminant Details

Butylated Hydroxyanisole (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.03 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.03 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.03 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.03 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.03 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.03 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: ?

Contaminant Details

chlorate (16)

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

92 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 72 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

91 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 71 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

77 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 57 µg/L

5/22/2014

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

51 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 31 µg/L

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

49 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 29 µg/L

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

48 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 28 µg/L

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

44 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 24 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<20 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

190 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 170 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

180 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 160 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

140 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 120 µg/L

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

98 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 78 µg/L

11/20/2013

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

81 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 61 µg/L

11/20/2013

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

75 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 55 µg/L

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

72 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 52 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<20 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 20 µg/L
Reference Level: ?

Contaminant Details

chlorodifluoromethane (HCFC-22) (14)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.08 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.08 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.08 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.08 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.08 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.08 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.08 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.08 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.08 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.08 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.08 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.08 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.08 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.08 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.08 µg/L
Reference Level: ?

Contaminant Details

chloromethane (14)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.2 µg/L
Reference Level: ?

Contaminant Details

chlorpyrifos (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.03 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.03 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.03 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.03 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.03 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.03 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: 2 µg/L

Contaminant Details

chromium (16)

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.26 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.06 µg/L

5/22/2014

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

0.23 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.03 µg/L

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

0.22 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.02 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

0.26 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.06 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.2 µg/L
Reference Level: ?

Contaminant Details

chromium-6 (16)

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.29 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.26 µg/L

5/22/2014

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

0.16 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.13 µg/L

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

0.14 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.11 µg/L

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

0.1 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.07 µg/L

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

0.058 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.028 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

0.03 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

0.26 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.23 µg/L

11/20/2013

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

0.13 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.1 µg/L

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

0.091 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.061 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.058 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.028 µg/L

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

0.058 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.028 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

0.032 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.002 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: ?

Contaminant Details

cobalt (16)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 1 µg/L
Reference Level: ?

Contaminant Details

dimethipin (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.2 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.2 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.2 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.2 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.2 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.2 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.2 µg/L
Reference Level: 140 µg/L

Contaminant Details

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (18)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

Maher 1,2,3

Maher TP ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

Maher 1,2,3

Maher TP ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

Minimum Reporting Level: 1 µg/L
Reference Level: ?

Contaminant Details

ethoprop (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.03 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.03 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.03 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.03 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.03 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.03 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: 1.14 µg/L

Contaminant Details

Germanium (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.3 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.3 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.3 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.3 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.3 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.3 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.3 µg/L
Reference Level: ?

Contaminant Details

HAA5 (five regulated haloacetic acids) (8)

Barnstable High School

Barnstable High School ℹ️

1.975 µg/L

Meets Reporting Threshold

6/18/2019

6 years ago

West Hyannisport Post Office

West Hyannisport Post Office ℹ️

1.876 µg/L

Meets Reporting Threshold

6/18/2019

6 years ago

Cape Codder Resort-1225 Iyannough Rd

Cape Codder Resort-1225 Iyannough Rd ℹ️

1.215 µg/L

Meets Reporting Threshold

6/18/2019

6 years ago

Veterans Park- Ocean St

Veterans Park- Ocean St ℹ️

0.351 µg/L

Meets Reporting Threshold

6/18/2019

6 years ago

West Hyannisport Post Office

West Hyannisport Post Office ℹ️

0.727 µg/L

Meets Reporting Threshold

12/17/2018

6 years ago

Veterans Park- Ocean St

Veterans Park- Ocean St ℹ️

0.693 µg/L

Meets Reporting Threshold

12/17/2018

6 years ago

Barnstable High School

Barnstable High School ℹ️

0.685 µg/L

Meets Reporting Threshold

12/17/2018

6 years ago

Cape Codder Resort-1225 Iyannough Rd

Cape Codder Resort-1225 Iyannough Rd ℹ️

0 µg/L

Meets Reporting Threshold

12/17/2018

6 years ago

Minimum Reporting Level: 0.5 µg/L
Reference Level: 60 µg/L

Contaminant Details

HAA6Br (six brominated haloacetic acids) (8)

West Hyannisport Post Office

West Hyannisport Post Office ℹ️

6.376 µg/L

6/18/2019

6 years ago

Barnstable High School

Barnstable High School ℹ️

6.259 µg/L

6/18/2019

6 years ago

Cape Codder Resort-1225 Iyannough Rd

Cape Codder Resort-1225 Iyannough Rd ℹ️

4.552 µg/L

6/18/2019

6 years ago

Veterans Park- Ocean St

Veterans Park- Ocean St ℹ️

0.69 µg/L

6/18/2019

6 years ago

West Hyannisport Post Office

West Hyannisport Post Office ℹ️

1.762 µg/L

12/17/2018

6 years ago

Veterans Park- Ocean St

Veterans Park- Ocean St ℹ️

1.715 µg/L

12/17/2018

6 years ago

Barnstable High School

Barnstable High School ℹ️

1.665 µg/L

12/17/2018

6 years ago

Cape Codder Resort-1225 Iyannough Rd

Cape Codder Resort-1225 Iyannough Rd ℹ️

0 µg/L

12/17/2018

6 years ago

Minimum Reporting Level: 0 µg/L
Reference Level: ?

Contaminant Details

HAA9 (nine haloacetic acids) (8)

West Hyannisport Post Office

West Hyannisport Post Office ℹ️

6.992 µg/L

6/18/2019

6 years ago

Barnstable High School

Barnstable High School ℹ️

6.914 µg/L

6/18/2019

6 years ago

Cape Codder Resort-1225 Iyannough Rd

Cape Codder Resort-1225 Iyannough Rd ℹ️

4.809 µg/L

6/18/2019

6 years ago

Veterans Park- Ocean St

Veterans Park- Ocean St ℹ️

0.69 µg/L

6/18/2019

6 years ago

West Hyannisport Post Office

West Hyannisport Post Office ℹ️

1.762 µg/L

12/17/2018

6 years ago

Veterans Park- Ocean St

Veterans Park- Ocean St ℹ️

1.715 µg/L

12/17/2018

6 years ago

Barnstable High School

Barnstable High School ℹ️

1.665 µg/L

12/17/2018

6 years ago

Cape Codder Resort-1225 Iyannough Rd

Cape Codder Resort-1225 Iyannough Rd ℹ️

0 µg/L

12/17/2018

6 years ago

Minimum Reporting Level: 0 µg/L
Reference Level: ?

Contaminant Details

hexafluoropropylene oxide dimer acid (GenX) (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.005 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.005 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.005 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

lithium (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<9 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<9 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<9 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<9 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<9 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<9 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 9 µg/L
Reference Level: ?

Contaminant Details

Manganese (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

77 µg/L

Meets Reporting Threshold

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

42.7 µg/L

Meets Reporting Threshold

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

27.8 µg/L

Meets Reporting Threshold

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

121 µg/L

Meets Reporting Threshold

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

72.2 µg/L

Meets Reporting Threshold

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

26.4 µg/L

Meets Reporting Threshold

12/12/2018

6 years ago

Minimum Reporting Level: 0.4 µg/L
Reference Level: 300 µg/L

Contaminant Details

methyl-tertiary-butyl-ether (MTBE) (18)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<5 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<5 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<5 µg/L

Below Reporting Level

12/18/2002

22 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<5 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<5 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<5 µg/L

Below Reporting Level

12/18/2002

22 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<5 µg/L

Below Reporting Level

12/18/2002

22 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<5 µg/L

Below Reporting Level

12/18/2002

22 years ago

Maher 1,2,3

Maher TP ℹ️

<5 µg/L

Below Reporting Level

12/18/2002

22 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<5 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<5 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<5 µg/L

Below Reporting Level

6/26/2002

23 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<5 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<5 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<5 µg/L

Below Reporting Level

6/26/2002

23 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<5 µg/L

Below Reporting Level

6/26/2002

23 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<5 µg/L

Below Reporting Level

6/26/2002

23 years ago

Maher 1,2,3

Maher TP ℹ️

<5 µg/L

Below Reporting Level

6/26/2002

23 years ago

Minimum Reporting Level: 5 µg/L
Reference Level: ?

Contaminant Details

molinate (18)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.9 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.9 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<0.9 µg/L

Below Reporting Level

12/18/2002

22 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<0.9 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.9 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<0.9 µg/L

Below Reporting Level

12/18/2002

22 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<0.9 µg/L

Below Reporting Level

12/18/2002

22 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<0.9 µg/L

Below Reporting Level

12/18/2002

22 years ago

Maher 1,2,3

Maher TP ℹ️

<0.9 µg/L

Below Reporting Level

12/18/2002

22 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.9 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.9 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<0.9 µg/L

Below Reporting Level

6/26/2002

23 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<0.9 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.9 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<0.9 µg/L

Below Reporting Level

6/26/2002

23 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<0.9 µg/L

Below Reporting Level

6/26/2002

23 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<0.9 µg/L

Below Reporting Level

6/26/2002

23 years ago

Maher 1,2,3

Maher TP ℹ️

<0.9 µg/L

Below Reporting Level

6/26/2002

23 years ago

Minimum Reporting Level: 0.9 µg/L
Reference Level: ?

Contaminant Details

molybdenum (16)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

<1 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

<1 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 1 µg/L
Reference Level: ?

Contaminant Details

N-ethyl perfluorooctanesulfonamidoacetic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.005 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.005 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.005 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

N-methyl perfluorooctanesulfonamidoacetic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.006 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.006 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.006 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.006 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.006 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.006 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.006 µg/L
Reference Level: ?

Contaminant Details

nitrobenzene (18)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<10 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<10 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<10 µg/L

Below Reporting Level

12/18/2002

22 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<10 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<10 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<10 µg/L

Below Reporting Level

12/18/2002

22 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<10 µg/L

Below Reporting Level

12/18/2002

22 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<10 µg/L

Below Reporting Level

12/18/2002

22 years ago

Maher 1,2,3

Maher TP ℹ️

<10 µg/L

Below Reporting Level

12/18/2002

22 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<10 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<10 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<10 µg/L

Below Reporting Level

6/26/2002

23 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<10 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<10 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<10 µg/L

Below Reporting Level

6/26/2002

23 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<10 µg/L

Below Reporting Level

6/26/2002

23 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<10 µg/L

Below Reporting Level

6/26/2002

23 years ago

Maher 1,2,3

Maher TP ℹ️

<10 µg/L

Below Reporting Level

6/26/2002

23 years ago

Minimum Reporting Level: 10 µg/L
Reference Level: ?

Contaminant Details

nonafluoro-3,6-dioxaheptanoic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.02 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.02 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.02 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.02 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.02 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.02 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.02 µg/L
Reference Level: ?

Contaminant Details

o-toluidine (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.007 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.007 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.007 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.007 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.007 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.007 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.007 µg/L
Reference Level: ?

Contaminant Details

oxyfluorfen (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.05 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.05 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.05 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.05 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.05 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.05 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.05 µg/L
Reference Level: 200 µg/L

Contaminant Details

perchlorate (18)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<4 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<4 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<4 µg/L

Below Reporting Level

12/18/2002

22 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<4 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<4 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<4 µg/L

Below Reporting Level

12/18/2002

22 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<4 µg/L

Below Reporting Level

12/18/2002

22 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<4 µg/L

Below Reporting Level

12/18/2002

22 years ago

Maher 1,2,3

Maher TP ℹ️

<4 µg/L

Below Reporting Level

12/18/2002

22 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<4 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<4 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<4 µg/L

Below Reporting Level

6/26/2002

23 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<4 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<4 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<4 µg/L

Below Reporting Level

6/26/2002

23 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<4 µg/L

Below Reporting Level

6/26/2002

23 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<4 µg/L

Below Reporting Level

6/26/2002

23 years ago

Maher 1,2,3

Maher TP ℹ️

<4 µg/L

Below Reporting Level

6/26/2002

23 years ago

Minimum Reporting Level: 4 µg/L
Reference Level: ?

Contaminant Details

perfluoro(2-ethoxyethane)sulfonic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluoro-3-methoxypropanoic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.004 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.004 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.004 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluoro-4-methoxybutanoic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorobutanesulfonic acid (20)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.09 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.09 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.09 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.09 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.09 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.09 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.09 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.09 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.09 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.09 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.09 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.09 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.09 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.09 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorobutanoic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

0.0093 µg/L

⚠️ Exceeds Reporting Level of 0.005 µg/L by 0.0043 µg/L

4/9/2024

18 months ago

Maher 1,2,3

Maher TP ℹ️

0.0115 µg/L

⚠️ Exceeds Reporting Level of 0.005 µg/L by 0.0065 µg/L

11/15/2023

23 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.005 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

0.0168 µg/L

⚠️ Exceeds Reporting Level of 0.005 µg/L by 0.0118 µg/L

5/16/2023

2 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.005 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

perfluorodecanoic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorododecanoic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluoroheptanesulfonic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluoroheptanoic acid (20)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

0.058 µg/L

⚠️ Exceeds Reporting Level of 0.01 µg/L by 0.048 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.026 µg/L

⚠️ Exceeds Reporting Level of 0.01 µg/L by 0.016 µg/L

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

0.02 µg/L

⚠️ Exceeds Reporting Level of 0.01 µg/L by 0.01 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

0.012 µg/L

⚠️ Exceeds Reporting Level of 0.01 µg/L by 0.002 µg/L

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.01 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.01 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.01 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

0.021 µg/L

⚠️ Exceeds Reporting Level of 0.01 µg/L by 0.011 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

0.02 µg/L

⚠️ Exceeds Reporting Level of 0.01 µg/L by 0.01 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.017 µg/L

⚠️ Exceeds Reporting Level of 0.01 µg/L by 0.007 µg/L

11/20/2013

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

0.015 µg/L

⚠️ Exceeds Reporting Level of 0.01 µg/L by 0.005 µg/L

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

0.014 µg/L

⚠️ Exceeds Reporting Level of 0.01 µg/L by 0.004 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.01 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.01 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorohexanesulfonic acid (20)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

0.27 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.24 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.075 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.045 µg/L

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

0.049 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.019 µg/L

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.03 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

0.082 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.052 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

0.066 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.036 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.053 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.023 µg/L

11/20/2013

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

0.035 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.005 µg/L

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

0.032 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.002 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.03 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorohexanoic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

4/9/2024

18 months ago

Maher 1,2,3

Maher TP ℹ️

0.0065 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0035 µg/L

11/15/2023

23 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

0.0058 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0028 µg/L

5/16/2023

2 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorononanoic acid (20)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.004 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.004 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.004 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

0.035 µg/L

⚠️ Exceeds Reporting Level of 0.02 µg/L by 0.015 µg/L

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.02 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.02 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.02 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.02 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.02 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.02 µg/L

Below Reporting Level

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluorooctanesulfonic acid (20)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.004 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.004 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.004 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

0.43 µg/L

⚠️ Exceeds Reporting Level of 0.04 µg/L by 0.39 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.21 µg/L

⚠️ Exceeds Reporting Level of 0.04 µg/L by 0.17 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

0.098 µg/L

⚠️ Exceeds Reporting Level of 0.04 µg/L by 0.058 µg/L

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

0.086 µg/L

⚠️ Exceeds Reporting Level of 0.04 µg/L by 0.046 µg/L

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.04 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.04 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.04 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

0.19 µg/L

⚠️ Exceeds Reporting Level of 0.04 µg/L by 0.15 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

0.17 µg/L

⚠️ Exceeds Reporting Level of 0.04 µg/L by 0.13 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.11 µg/L

⚠️ Exceeds Reporting Level of 0.04 µg/L by 0.07 µg/L

11/20/2013

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

0.061 µg/L

⚠️ Exceeds Reporting Level of 0.04 µg/L by 0.021 µg/L

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

0.06 µg/L

⚠️ Exceeds Reporting Level of 0.04 µg/L by 0.02 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.04 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.04 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluorooctanoic acid (20)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.004 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.004 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.004 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

0.062 µg/L

⚠️ Exceeds Reporting Level of 0.02 µg/L by 0.042 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.02 µg/L

⚠️ Exceeds Reporting Level of 0.02 µg/L by 0 µg/L

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

0.02 µg/L

⚠️ Exceeds Reporting Level of 0.02 µg/L by 0 µg/L

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.02 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.02 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.02 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.02 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

0.02 µg/L

⚠️ Exceeds Reporting Level of 0.02 µg/L by 0 µg/L

11/20/2013

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.02 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluoropentanesulfonic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.004 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.004 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.004 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.004 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluoropentanoic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

0.0051 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0021 µg/L

4/9/2024

18 months ago

Maher 1,2,3

Maher TP ℹ️

0.0187 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0157 µg/L

11/15/2023

23 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.003 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

0.0298 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0268 µg/L

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

0.0043 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0013 µg/L

5/16/2023

2 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.003 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorotetradecanoic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.008 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.008 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.008 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.008 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.008 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.008 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.008 µg/L
Reference Level: ?

Contaminant Details

perfluorotridecanoic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.007 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.007 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.007 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.007 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.007 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.007 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.007 µg/L
Reference Level: ?

Contaminant Details

perfluoroundecanoic acid (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.002 µg/L

Below Reporting Level

4/9/2024

18 months ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.002 µg/L

Below Reporting Level

11/15/2023

23 months ago

Maher 1,2,3

Maher TP ℹ️

<0.002 µg/L

Below Reporting Level

11/15/2023

23 months ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.002 µg/L

Below Reporting Level

5/16/2023

2 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.002 µg/L

Below Reporting Level

5/16/2023

2 years ago

Maher 1,2,3

Maher TP ℹ️

<0.002 µg/L

Below Reporting Level

5/16/2023

2 years ago

Minimum Reporting Level: 0.002 µg/L
Reference Level: ?

Contaminant Details

profenofos (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.3 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.3 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.3 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.3 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.3 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.3 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.3 µg/L
Reference Level: 0.3 µg/L

Contaminant Details

quinoline (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.02 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.02 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.02 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.02 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.02 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.02 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.02 µg/L
Reference Level: 0.01 µg/L

Contaminant Details

s-ethyl-dipropylthiocarbamate (EPTC) (18)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

Maher 1,2,3

Maher TP ℹ️

<1 µg/L

Below Reporting Level

12/18/2002

22 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

Maher 1,2,3

Maher TP ℹ️

<1 µg/L

Below Reporting Level

6/26/2002

23 years ago

Minimum Reporting Level: 1 µg/L
Reference Level: ?

Contaminant Details

strontium (16)

West Hyannisport Post Office

Distribution System ℹ️

99 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 98.7 µg/L

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

95 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 94.7 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

46 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 45.7 µg/L

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

42 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 41.7 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

28 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 27.7 µg/L

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

28 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 27.7 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

21 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 20.7 µg/L

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

12 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 11.7 µg/L

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

84 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 83.7 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

40 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 39.7 µg/L

11/20/2013

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

39 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 38.7 µg/L

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

38 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 37.7 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

31 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 30.7 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

25 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 24.7 µg/L

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

22 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 21.7 µg/L

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

9 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 8.7 µg/L

11/20/2013

11 years ago

Minimum Reporting Level: 0.3 µg/L
Reference Level: ?

Contaminant Details

tebuconazole (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.2 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.2 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.2 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.2 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.2 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.2 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.2 µg/L
Reference Level: 190 µg/L

Contaminant Details

terbacil (18)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

Maher 1,2,3

Maher TP ℹ️

<2 µg/L

Below Reporting Level

12/18/2002

22 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 2 1652

MARY DUNN WELL # 2 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

SIMMONS POND 1655

SIMMONS POND ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

MARY DUNN WELL # 4 1654

MARY DUNN WELL # 4 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

AIRPORT # 1 1644

AIRPORT # 1 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

STRAIGHTWAY WELL # 2 23013

STRAIGHTWAY WELL # 2 ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

Maher 1,2,3

Maher TP ℹ️

<2 µg/L

Below Reporting Level

6/26/2002

23 years ago

Minimum Reporting Level: 2 µg/L
Reference Level: ?

Contaminant Details

Total Permethrin (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.04 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.04 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.04 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.04 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.04 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.04 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.04 µg/L
Reference Level: 3.344 µg/L

Contaminant Details

tribufos (6)

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.07 µg/L

Below Reporting Level

6/11/2019

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.07 µg/L

Below Reporting Level

6/11/2019

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.07 µg/L

Below Reporting Level

6/11/2019

6 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.07 µg/L

Below Reporting Level

12/12/2018

6 years ago

Mary Dunn combined

Mary Dunn Teatment Plant ℹ️

<0.07 µg/L

Below Reporting Level

12/12/2018

6 years ago

Maher 1,2,3

Maher TP ℹ️

<0.07 µg/L

Below Reporting Level

12/12/2018

6 years ago

Minimum Reporting Level: 0.07 µg/L
Reference Level: 0.6 µg/L

Contaminant Details

vanadium (16)

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

0.21 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.01 µg/L

5/22/2014

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

<0.2 µg/L

Below Reporting Level

5/22/2014

11 years ago

EPTDS from Mary Dunn Well #1

Mary Dunn Well #1 ℹ️

0.29 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.09 µg/L

11/20/2013

11 years ago

Straightway Booster

Storage Tank (Hyannis/Simmons/Straightway Wells) ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #2

Mary Dunn Well #2 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #3

Mary Dunn Well #3 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Mary Dunn Well #4

Mary Dunn Well #4 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

EPTDS from Airport #1

Airport #1 ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

Maher 1,2,3

Maher TP ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

West Hyannisport Post Office

Distribution System ℹ️

<0.2 µg/L

Below Reporting Level

11/20/2013

11 years ago

Minimum Reporting Level: 0.2 µg/L
Reference Level: ?

Contaminant Details

Sampling Facilities

Storage Tank (Hyannis/Simmons/Straightway Wells)
Ground Water (GW)

Straightway BoosterEntry Point to the Distribution System (EP)

Mary Dunn Teatment Plant
Ground Water (GW)

Mary Dunn combinedEntry Point to the Distribution System (EP)

Maher TP
Ground Water (GW)

Maher 1,2,3Entry Point to the Distribution System (EP)

West Hyannisport Post Office
Ground Water (GW)

West Hyannisport Post OfficeDistribution System (DS)

Veterans Park- Ocean St
Ground Water (GW)

Veterans Park- Ocean StDistribution System (DS)

Barnstable High School
Ground Water (GW)

Barnstable High SchoolDistribution System (DS)

Cape Codder Resort-1225 Iyannough Rd
Ground Water (GW)

Cape Codder Resort-1225 Iyannough RdDistribution System (DS)

Mary Dunn Well #1
Ground Water (GW)

EPTDS from Mary Dunn Well #1Entry Point to the Distribution System (EP)

Mary Dunn Well #2
Ground Water (GW)

EPTDS from Mary Dunn Well #2Entry Point to the Distribution System (EP)

Mary Dunn Well #3
Ground Water (GW)

EPTDS from Mary Dunn Well #3Entry Point to the Distribution System (EP)

Mary Dunn Well #4
Ground Water (GW)

EPTDS from Mary Dunn Well #4Entry Point to the Distribution System (EP)

Airport #1
Ground Water (GW)

EPTDS from Airport #1Entry Point to the Distribution System (EP)

Distribution System
Ground Water (GW)

West Hyannisport Post OfficeMaximum Residence Time (MR)

SIMMONS POND
Ground Water (GW)

SIMMONS POND 1655Entry Point to the Distribution System (EP)

STRAIGHTWAY WELL # 2
Ground Water (GW)

STRAIGHTWAY WELL # 2 23013Entry Point to the Distribution System (EP)

MARY DUNN WELL # 2
Ground Water (GW)

MARY DUNN WELL # 2 1652SR (SR)

SIMMONS POND
Ground Water (GW)

SIMMONS POND 1655SR (SR)

MARY DUNN WELL # 4
Ground Water (GW)

MARY DUNN WELL # 4 1654SR (SR)

AIRPORT # 1
Ground Water (GW)

AIRPORT # 1 1644SR (SR)

FAQ

Is Hyannis Water tap water safe to drink?

When was Hyannis Water last tested for water contamination?

The latest water samples were taken on April 9th, 2024.

Contaminants

1,1-dichloroethane (14)

1,2,3-trichloropropane (14)

1,3-butadiene (14)

1,4-dioxane (14)

1-butanol (6)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (6)

1H,1H,2H,2H-perfluorodecane sulfonic acid (6)

1H,1H,2H,2H-perfluorohexane sulfonic acid (6)

1H,1H,2H,2H-perfluorooctane sulfonic acid (6)

2,4-dinitrotoluene (18)

2,6-dinitrotoluene (18)

2-methoxyethanol (6)

2-propen-1-ol (Allyl Alcohol) (6)

4,4'-dichloro dichlorophenyl ethylene (DDE) (18)

4,8-dioxa-3H-perfluorononanoic acid (6)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (6)

alpha-hexachlorocyclohexane (6)

bromochloromethane (Halon 1011) (14)

bromomethane (14)

Butylated Hydroxyanisole (6)

chlorate (16)

chlorodifluoromethane (HCFC-22) (14)

chloromethane (14)

chlorpyrifos (6)

chromium (16)

chromium-6 (16)

cobalt (16)

dimethipin (6)

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (18)

ethoprop (6)

Germanium (6)

HAA5 (five regulated haloacetic acids) (8)

HAA6Br (six brominated haloacetic acids) (8)

HAA9 (nine haloacetic acids) (8)

hexafluoropropylene oxide dimer acid (GenX) (6)

lithium (6)

Manganese (6)

methyl-tertiary-butyl-ether (MTBE) (18)

molinate (18)

molybdenum (16)

N-ethyl perfluorooctanesulfonamidoacetic acid (6)

N-methyl perfluorooctanesulfonamidoacetic acid (6)

nitrobenzene (18)

nonafluoro-3,6-dioxaheptanoic acid (6)

o-toluidine (6)

oxyfluorfen (6)

perchlorate (18)

perfluoro(2-ethoxyethane)sulfonic acid (6)

perfluoro-3-methoxypropanoic acid (6)

perfluoro-4-methoxybutanoic acid (6)

perfluorobutanesulfonic acid (20)

perfluorobutanoic acid (6)

perfluorodecanoic acid (6)

perfluorododecanoic acid (6)

perfluoroheptanesulfonic acid (6)

perfluoroheptanoic acid (20)

perfluorohexanesulfonic acid (20)

perfluorohexanoic acid (6)

perfluorononanoic acid (20)

perfluorooctanesulfonic acid (20)

perfluorooctanoic acid (20)

perfluoropentanesulfonic acid (6)

perfluoropentanoic acid (6)

perfluorotetradecanoic acid (6)

perfluorotridecanoic acid (6)

perfluoroundecanoic acid (6)

profenofos (6)

quinoline (6)

s-ethyl-dipropylthiocarbamate (EPTC) (18)

strontium (16)

tebuconazole (6)

terbacil (18)

Total Permethrin (6)

tribufos (6)

vanadium (16)

Sampling Facilities

Storage Tank (Hyannis/Simmons/Straightway Wells) Ground Water (GW)

Mary Dunn Teatment Plant Ground Water (GW)

Maher TP Ground Water (GW)

Storage Tank (Hyannis/Simmons/Straightway Wells)
Ground Water (GW)

Mary Dunn Teatment Plant
Ground Water (GW)

Maher TP
Ground Water (GW)

West Hyannisport Post Office
Ground Water (GW)

Veterans Park- Ocean St
Ground Water (GW)

Barnstable High School
Ground Water (GW)

Cape Codder Resort-1225 Iyannough Rd
Ground Water (GW)

Mary Dunn Well #1
Ground Water (GW)

Mary Dunn Well #2
Ground Water (GW)

Mary Dunn Well #3
Ground Water (GW)

Mary Dunn Well #4
Ground Water (GW)

Airport #1
Ground Water (GW)

Distribution System
Ground Water (GW)

SIMMONS POND
Ground Water (GW)

STRAIGHTWAY WELL # 2
Ground Water (GW)

MARY DUNN WELL # 2
Ground Water (GW)

SIMMONS POND
Ground Water (GW)

MARY DUNN WELL # 4
Ground Water (GW)

AIRPORT # 1
Ground Water (GW)