Needham Water Dept. (MA) Water Quality

Needham Water Dept. is a large public water system in EPA region 1 that provides tap water for the 02492 zip codes. It has 7 facilities where the water supply was tested for 78 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 17.09 µg/L. The maximum reported level of Manganese was 9.99 µg/L. The maximum reported level of quinoline was 0.18 µg/L. Some (2 of 6 or 33%) of the latest water samples showed levels of quinoline that were at or above unsafe concentration levels. There were 3 contamintants found in the Needham Water Dept. water supply at levels that were above the minimum reporting level. 1 of the contaminants were above the reference level, which means they may pose a risk to human health.

Table of Contents
Contaminants
Facilities
FAQ

Contaminants

Jump To Contaminant
1,1-dichloroethane (6)
1,2,3-trichloropropane (6)
1,3-butadiene (6)
1,4-dioxane (6)
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 (2)
2,6-dinitrotoluene (2)
2-methoxyethanol (6)
2-propen-1-ol (Allyl Alcohol) (6)
4,4'-dichloro dichlorophenyl ethylene (DDE) (2)
4,8-dioxa-3H-perfluorononanoic acid (6)
9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (6)
alpha-hexachlorocyclohexane (6)
anatoxin-a (8)
bromochloromethane (Halon 1011) (6)
bromomethane (6)
Butylated Hydroxyanisole (6)
chlorate (12)
chlorodifluoromethane (HCFC-22) (6)
chloromethane (6)
chlorpyrifos (6)
chromium (12)
chromium-6 (12)
cobalt (12)
cylindrospermopsin (8)
dimethipin (6)
dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (2)
ethoprop (6)
Germanium (6)
HAA5 (five regulated haloacetic acids) (16)
HAA6Br (six brominated haloacetic acids) (16)
HAA9 (nine haloacetic acids) (16)
hexafluoropropylene oxide dimer acid (GenX) (6)
lithium (6)
Manganese (6)
methyl-tertiary-butyl-ether (MTBE) (2)
molinate (2)
molybdenum (12)
N-ethyl perfluorooctanesulfonamidoacetic acid (6)
N-methyl perfluorooctanesulfonamidoacetic acid (6)
nitrobenzene (2)
nonafluoro-3,6-dioxaheptanoic acid (6)
o-toluidine (6)
oxyfluorfen (6)
perchlorate (2)
perfluoro(2-ethoxyethane)sulfonic acid (6)
perfluoro-3-methoxypropanoic acid (6)
perfluoro-4-methoxybutanoic acid (6)
perfluorobutanesulfonic acid (12)
perfluorobutanoic acid (6)
perfluorodecanoic acid (6)
perfluorododecanoic acid (6)
perfluoroheptanesulfonic acid (6)
perfluoroheptanoic acid (12)
perfluorohexanesulfonic acid (12)
perfluorohexanoic acid (6)
perfluorononanoic acid (12)
perfluorooctanesulfonic acid (12)
perfluorooctanoic acid (12)
perfluoropentanesulfonic acid (6)
perfluoropentanoic acid (6)
perfluorotetradecanoic acid (6)
perfluorotridecanoic acid (6)
perfluoroundecanoic acid (6)
profenofos (6)
quinoline (6)
s-ethyl-dipropylthiocarbamate (EPTC) (2)
strontium (12)
tebuconazole (6)
terbacil (2)
total microcystins (8)
Total Permethrin (6)
tribufos (6)
vanadium (12)

1,1-dichloroethane (6)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.03 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.03 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

1,2,3-trichloropropane (6)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.03 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.03 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

1,3-butadiene (6)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.1 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.1 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.1 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.1 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.1 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.1 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

1,4-dioxane (6)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.07 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.07 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.07 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.07 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.07 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.07 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

1-butanol (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<2 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<2 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<2 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<2 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<2 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<2 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

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

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.005 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

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

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.005 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

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

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

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

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.005 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

2,4-dinitrotoluene (2)

EPTDS from Charles River WTP

Charles River WTP ℹ️

<2 µg/L

Below Reporting Level

12/26/2002

22 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<2 µg/L

Below Reporting Level

7/17/2002

23 years ago

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

Contaminant Details

2,6-dinitrotoluene (2)

EPTDS from Charles River WTP

Charles River WTP ℹ️

<2 µg/L

Below Reporting Level

12/26/2002

22 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<2 µg/L

Below Reporting Level

7/17/2002

23 years ago

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

Contaminant Details

2-methoxyethanol (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.4 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.4 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.4 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.4 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.4 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.4 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

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

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.5 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.5 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.5 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.5 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.5 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.5 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

4,4'-dichloro dichlorophenyl ethylene (DDE) (2)

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.8 µg/L

Below Reporting Level

12/26/2002

22 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.8 µg/L

Below Reporting Level

7/17/2002

23 years ago

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

Contaminant Details

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

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

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

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.002 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.002 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.002 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.002 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.002 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.002 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

alpha-hexachlorocyclohexane (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.01 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.01 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.01 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.01 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.01 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.01 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

anatoxin-a (8)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

11/24/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

11/9/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

10/27/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

9/23/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

9/10/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

8/26/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

8/12/2020

5 years ago

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

Contaminant Details

bromochloromethane (Halon 1011) (6)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.06 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.06 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.06 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.06 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.06 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.06 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

bromomethane (6)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.2 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.2 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

Butylated Hydroxyanisole (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

chlorate (12)

DSMRT for MWRA

Distribution System - SW ℹ️

187 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 167 µg/L

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

181 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 161 µg/L

8/27/2015

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

161 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 141 µg/L

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

88.3 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 68.3 µg/L

5/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

88.3 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 68.3 µg/L

5/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

60 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 40 µg/L

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

36 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 16 µg/L

2/26/2015

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

112 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 92 µg/L

11/17/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

111 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 91 µg/L

11/17/2014

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

105 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 85 µg/L

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

151.533 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 131.533 µg/L

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

183.939 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 163.939 µg/L

11/15/2013

11 years ago

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

Contaminant Details

chlorodifluoromethane (HCFC-22) (6)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.08 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.08 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.08 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.08 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.08 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.08 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

chloromethane (6)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.2 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.2 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

chlorpyrifos (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

chromium (12)

EPTDS from MWRA

MWRA Intertie ℹ️

0.31 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.11 µg/L

8/27/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

0.31 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.11 µg/L

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

0.27 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.07 µg/L

5/26/2015

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

0.24 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.04 µg/L

5/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

0.21 µg/L

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

5/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

0.32 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.12 µg/L

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

0.26 µg/L

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

2/26/2015

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

0.42 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.22 µg/L

11/17/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

0.33 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.13 µg/L

11/17/2014

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

0.33 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.13 µg/L

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.2 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.2 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

chromium-6 (12)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2015

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

0.096 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.066 µg/L

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

0.095 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.065 µg/L

5/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<0.03 µg/L

Below Reporting Level

5/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

0.12 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.09 µg/L

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

2/26/2015

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

0.12 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.09 µg/L

11/17/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

11/17/2014

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<0.03 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

0.102 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.072 µg/L

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

0.134 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.104 µg/L

11/15/2013

11 years ago

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

Contaminant Details

cobalt (12)

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

8/27/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

5/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

5/26/2015

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

2/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

11/17/2014

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

11/17/2014

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<1 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<1 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

cylindrospermopsin (8)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.09 µg/L

Below Reporting Level

11/24/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.09 µg/L

Below Reporting Level

11/9/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.09 µg/L

Below Reporting Level

10/27/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.09 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.09 µg/L

Below Reporting Level

9/23/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.09 µg/L

Below Reporting Level

9/10/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.09 µg/L

Below Reporting Level

8/26/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.09 µg/L

Below Reporting Level

8/12/2020

5 years ago

Minimum Reporting Level: 0.09 µg/L
Reference Level: 0.7 µg/L

Contaminant Details

dimethipin (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.2 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.2 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.2 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.2 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (2)

EPTDS from Charles River WTP

Charles River WTP ℹ️

<1 µg/L

Below Reporting Level

12/26/2002

22 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<1 µg/L

Below Reporting Level

7/17/2002

23 years ago

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

Contaminant Details

ethoprop (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

Germanium (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.3 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.3 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

HAA5 (five regulated haloacetic acids) (16)

DSDBP - St. Mary's Station

DISTRIBUTION SYSTEM ℹ️

6.93 µg/L

Meets Reporting Threshold

11/17/2020

4 years ago

DSDBP - High School, 609 Webster Street

DISTRIBUTION SYSTEM ℹ️

5.066 µg/L

Meets Reporting Threshold

11/17/2020

4 years ago

DSDBP - DPW, 470 Dedham Avenue

DISTRIBUTION SYSTEM ℹ️

4.504 µg/L

Meets Reporting Threshold

11/17/2020

4 years ago

DSDBP - SLF Building, Central Avenue

DISTRIBUTION SYSTEM ℹ️

3.022 µg/L

Meets Reporting Threshold

11/17/2020

4 years ago

DSDBP - High School, 609 Webster Street

DISTRIBUTION SYSTEM ℹ️

13.93 µg/L

Meets Reporting Threshold

8/12/2020

5 years ago

DSDBP - St. Mary's Station

DISTRIBUTION SYSTEM ℹ️

13.64 µg/L

Meets Reporting Threshold

8/12/2020

5 years ago

DSDBP - DPW, 470 Dedham Avenue

DISTRIBUTION SYSTEM ℹ️

12.106 µg/L

Meets Reporting Threshold

8/12/2020

5 years ago

DSDBP - SLF Building, Central Avenue

DISTRIBUTION SYSTEM ℹ️

5.64 µg/L

Meets Reporting Threshold

8/12/2020

5 years ago

DSDBP - St. Mary's Station

DISTRIBUTION SYSTEM ℹ️

17.09 µg/L

Meets Reporting Threshold

5/27/2020

5 years ago

DSDBP - High School, 609 Webster Street

DISTRIBUTION SYSTEM ℹ️

12.81 µg/L

Meets Reporting Threshold

5/27/2020

5 years ago

DSDBP - DPW, 470 Dedham Avenue

DISTRIBUTION SYSTEM ℹ️

6.068 µg/L

Meets Reporting Threshold

5/27/2020

5 years ago

DSDBP - SLF Building, Central Avenue

DISTRIBUTION SYSTEM ℹ️

5.111 µg/L

Meets Reporting Threshold

5/27/2020

5 years ago

DSDBP - St. Mary's Station

DISTRIBUTION SYSTEM ℹ️

15.837 µg/L

Meets Reporting Threshold

2/18/2020

5 years ago

DSDBP - SLF Building, Central Avenue

DISTRIBUTION SYSTEM ℹ️

7.37 µg/L

Meets Reporting Threshold

2/18/2020

5 years ago

DSDBP - High School, 609 Webster Street

DISTRIBUTION SYSTEM ℹ️

5.208 µg/L

Meets Reporting Threshold

2/18/2020

5 years ago

DSDBP - DPW, 470 Dedham Avenue

DISTRIBUTION SYSTEM ℹ️

5.059 µg/L

Meets Reporting Threshold

2/18/2020

5 years ago

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

Contaminant Details

HAA6Br (six brominated haloacetic acids) (16)

DSDBP - St. Mary's Station

DISTRIBUTION SYSTEM ℹ️

13.24 µg/L

11/17/2020

4 years ago

DSDBP - High School, 609 Webster Street

DISTRIBUTION SYSTEM ℹ️

11.98 µg/L

11/17/2020

4 years ago

DSDBP - DPW, 470 Dedham Avenue

DISTRIBUTION SYSTEM ℹ️

11.45 µg/L

11/17/2020

4 years ago

DSDBP - SLF Building, Central Avenue

DISTRIBUTION SYSTEM ℹ️

10.312 µg/L

11/17/2020

4 years ago

DSDBP - SLF Building, Central Avenue

DISTRIBUTION SYSTEM ℹ️

7.83 µg/L

8/12/2020

5 years ago

DSDBP - DPW, 470 Dedham Avenue

DISTRIBUTION SYSTEM ℹ️

2.301 µg/L

8/12/2020

5 years ago

DSDBP - High School, 609 Webster Street

DISTRIBUTION SYSTEM ℹ️

0.979 µg/L

8/12/2020

5 years ago

DSDBP - St. Mary's Station

DISTRIBUTION SYSTEM ℹ️

0.956 µg/L

8/12/2020

5 years ago

DSDBP - DPW, 470 Dedham Avenue

DISTRIBUTION SYSTEM ℹ️

9.76 µg/L

5/27/2020

5 years ago

DSDBP - SLF Building, Central Avenue

DISTRIBUTION SYSTEM ℹ️

9.57 µg/L

5/27/2020

5 years ago

DSDBP - High School, 609 Webster Street

DISTRIBUTION SYSTEM ℹ️

5.81 µg/L

5/27/2020

5 years ago

DSDBP - St. Mary's Station

DISTRIBUTION SYSTEM ℹ️

2.084 µg/L

5/27/2020

5 years ago

DSDBP - SLF Building, Central Avenue

DISTRIBUTION SYSTEM ℹ️

9.88 µg/L

2/18/2020

5 years ago

DSDBP - High School, 609 Webster Street

DISTRIBUTION SYSTEM ℹ️

8.2 µg/L

2/18/2020

5 years ago

DSDBP - DPW, 470 Dedham Avenue

DISTRIBUTION SYSTEM ℹ️

7.61 µg/L

2/18/2020

5 years ago

DSDBP - St. Mary's Station

DISTRIBUTION SYSTEM ℹ️

3.008 µg/L

2/18/2020

5 years ago

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

Contaminant Details

HAA9 (nine haloacetic acids) (16)

DSDBP - St. Mary's Station

DISTRIBUTION SYSTEM ℹ️

17.73 µg/L

11/17/2020

4 years ago

DSDBP - High School, 609 Webster Street

DISTRIBUTION SYSTEM ℹ️

15.026 µg/L

11/17/2020

4 years ago

DSDBP - DPW, 470 Dedham Avenue

DISTRIBUTION SYSTEM ℹ️

13.984 µg/L

11/17/2020

4 years ago

DSDBP - SLF Building, Central Avenue

DISTRIBUTION SYSTEM ℹ️

12.642 µg/L

11/17/2020

4 years ago

DSDBP - High School, 609 Webster Street

DISTRIBUTION SYSTEM ℹ️

14.909 µg/L

8/12/2020

5 years ago

DSDBP - St. Mary's Station

DISTRIBUTION SYSTEM ℹ️

14.596 µg/L

8/12/2020

5 years ago

DSDBP - DPW, 470 Dedham Avenue

DISTRIBUTION SYSTEM ℹ️

14.031 µg/L

8/12/2020

5 years ago

DSDBP - SLF Building, Central Avenue

DISTRIBUTION SYSTEM ℹ️

11.59 µg/L

8/12/2020

5 years ago

DSDBP - St. Mary's Station

DISTRIBUTION SYSTEM ℹ️

19.174 µg/L

5/27/2020

5 years ago

DSDBP - High School, 609 Webster Street

DISTRIBUTION SYSTEM ℹ️

17.54 µg/L

5/27/2020

5 years ago

DSDBP - DPW, 470 Dedham Avenue

DISTRIBUTION SYSTEM ℹ️

13.478 µg/L

5/27/2020

5 years ago

DSDBP - SLF Building, Central Avenue

DISTRIBUTION SYSTEM ℹ️

12.441 µg/L

5/27/2020

5 years ago

DSDBP - St. Mary's Station

DISTRIBUTION SYSTEM ℹ️

18.19 µg/L

2/18/2020

5 years ago

DSDBP - SLF Building, Central Avenue

DISTRIBUTION SYSTEM ℹ️

13.98 µg/L

2/18/2020

5 years ago

DSDBP - High School, 609 Webster Street

DISTRIBUTION SYSTEM ℹ️

10.528 µg/L

2/18/2020

5 years ago

DSDBP - DPW, 470 Dedham Avenue

DISTRIBUTION SYSTEM ℹ️

9.839 µg/L

2/18/2020

5 years ago

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

Contaminant Details

hexafluoropropylene oxide dimer acid (GenX) (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.005 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

lithium (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<9 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<9 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<9 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<9 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<9 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<9 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

Manganese (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

4.46 µg/L

Meets Reporting Threshold

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

4.02 µg/L

Meets Reporting Threshold

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.4 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

9.99 µg/L

Meets Reporting Threshold

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

7.21 µg/L

Meets Reporting Threshold

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.4 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

methyl-tertiary-butyl-ether (MTBE) (2)

EPTDS from Charles River WTP

Charles River WTP ℹ️

<5 µg/L

Below Reporting Level

12/26/2002

22 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<5 µg/L

Below Reporting Level

7/17/2002

23 years ago

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

Contaminant Details

molinate (2)

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.9 µg/L

Below Reporting Level

12/26/2002

22 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.9 µg/L

Below Reporting Level

7/17/2002

23 years ago

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

Contaminant Details

molybdenum (12)

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

8/27/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

5/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

5/26/2015

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

2/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

11/17/2014

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

11/17/2014

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<1 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<1 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

N-ethyl perfluorooctanesulfonamidoacetic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.005 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

N-methyl perfluorooctanesulfonamidoacetic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.006 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.006 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.006 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.006 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.006 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.006 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

nitrobenzene (2)

EPTDS from Charles River WTP

Charles River WTP ℹ️

<10 µg/L

Below Reporting Level

12/26/2002

22 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<10 µg/L

Below Reporting Level

7/17/2002

23 years ago

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

Contaminant Details

nonafluoro-3,6-dioxaheptanoic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.02 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.02 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.02 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.02 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.02 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

o-toluidine (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.007 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.007 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.007 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.007 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.007 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.007 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

oxyfluorfen (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.05 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.05 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.05 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.05 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.05 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.05 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

perchlorate (2)

EPTDS from Charles River WTP

Charles River WTP ℹ️

<4 µg/L

Below Reporting Level

12/26/2002

22 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<4 µg/L

Below Reporting Level

7/17/2002

23 years ago

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

Contaminant Details

perfluoro(2-ethoxyethane)sulfonic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

perfluoro-3-methoxypropanoic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.004 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

perfluoro-4-methoxybutanoic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

perfluorobutanesulfonic acid (12)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.09 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.09 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.09 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.09 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.09 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.09 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

perfluorobutanoic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.005 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

perfluorodecanoic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

perfluorododecanoic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

perfluoroheptanesulfonic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

perfluoroheptanoic acid (12)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.01 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.01 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.01 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.01 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.01 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.01 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

perfluorohexanesulfonic acid (12)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.03 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.03 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

perfluorohexanoic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

perfluorononanoic acid (12)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.004 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/17/2024

20 months ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.02 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.02 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

perfluorooctanesulfonic acid (12)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.004 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

4/23/2024

17 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

0.005 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.001 µg/L

1/17/2024

20 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

1/17/2024

20 months ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.04 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.04 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.04 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.04 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.04 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.04 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

perfluorooctanoic acid (12)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

10/15/2024

11 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

0.004 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0 µg/L

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

4/23/2024

17 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

0.0046 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.0006 µg/L

1/17/2024

20 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

1/17/2024

20 months ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.02 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.02 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

perfluoropentanesulfonic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.004 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

perfluoropentanoic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

perfluorotetradecanoic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.008 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.008 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.008 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.008 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.008 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.008 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

perfluorotridecanoic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.007 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.007 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.007 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.007 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.007 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.007 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

perfluoroundecanoic acid (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.002 µg/L

Below Reporting Level

10/15/2024

11 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.002 µg/L

Below Reporting Level

7/15/2024

14 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.002 µg/L

Below Reporting Level

7/15/2024

14 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.002 µg/L

Below Reporting Level

4/23/2024

17 months ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.002 µg/L

Below Reporting Level

1/17/2024

20 months ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.002 µg/L

Below Reporting Level

1/17/2024

20 months ago

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

Contaminant Details

profenofos (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.3 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.3 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

quinoline (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.02 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

0.0252 µg/L

☠️ Exceeds Reference Level by 0.0152 µg/L

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.02 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.02 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

0.18 µg/L

☠️ Exceeds Reference Level by 0.17 µg/L

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

s-ethyl-dipropylthiocarbamate (EPTC) (2)

EPTDS from Charles River WTP

Charles River WTP ℹ️

<1 µg/L

Below Reporting Level

12/26/2002

22 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<1 µg/L

Below Reporting Level

7/17/2002

23 years ago

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

Contaminant Details

strontium (12)

DSMRT for MWRA

Distribution System - SW ℹ️

37.2 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 36.9 µg/L

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

35.3 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 35 µg/L

8/27/2015

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

105 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 104.7 µg/L

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

37.7 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 37.4 µg/L

5/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

35.6 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 35.3 µg/L

5/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

142 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 141.7 µg/L

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

35.4 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 35.1 µg/L

2/26/2015

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

139 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 138.7 µg/L

11/17/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

37.4 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 37.1 µg/L

11/17/2014

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

36 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 35.7 µg/L

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

125.142 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 124.842 µg/L

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

119.514 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 119.214 µg/L

11/15/2013

11 years ago

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

Contaminant Details

tebuconazole (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.2 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.2 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.2 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.2 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

terbacil (2)

EPTDS from Charles River WTP

Charles River WTP ℹ️

<2 µg/L

Below Reporting Level

12/26/2002

22 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<2 µg/L

Below Reporting Level

7/17/2002

23 years ago

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

Contaminant Details

total microcystins (8)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

11/24/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

11/9/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

10/27/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

9/23/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

9/10/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

8/26/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.3 µg/L

Below Reporting Level

8/12/2020

5 years ago

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

Contaminant Details

Total Permethrin (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.04 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.04 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.04 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.04 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.04 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.04 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

tribufos (6)

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.07 µg/L

Below Reporting Level

10/13/2020

4 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.07 µg/L

Below Reporting Level

7/16/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.07 µg/L

Below Reporting Level

7/16/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.07 µg/L

Below Reporting Level

5/18/2020

5 years ago

EPTDS (St. Mary St. Station - Meter 160)

MWRA Connection ℹ️

<0.07 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Charles River WTP ℹ️

<0.07 µg/L

Below Reporting Level

1/27/2020

5 years ago

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

Contaminant Details

vanadium (12)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

8/27/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

5/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

5/26/2015

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

<0.2 µg/L

Below Reporting Level

5/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

2/26/2015

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

2/26/2015

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

11/17/2014

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

11/17/2014

10 years ago

DSMRT for Charles River WTP

Distribution System - GW ℹ️

<0.2 µg/L

Below Reporting Level

11/17/2014

10 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.2 µg/L

Below Reporting Level

5/21/2014

11 years ago

EPTDS from Charles River WTP

Charles River WTP ℹ️

<0.2 µg/L

Below Reporting Level

11/15/2013

11 years ago

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

Contaminant Details

Sampling Facilities

MWRA Connection
Surface Water (SW)

EPTDS (St. Mary St. Station - Meter 160)Entry Point to the Distribution System (EP)

Charles River WTP
Ground Water (GW)

Entry Point to Dist. SystemEntry Point to the Distribution System (EP)

DISTRIBUTION SYSTEM
Multiple Sources (MX)

DSDBP - High School, 609 Webster StreetDistribution System (DS)

DSDBP - SLF Building, Central AvenueDistribution System (DS)

DSDBP - DPW, 470 Dedham AvenueDistribution System (DS)

DSDBP - St. Mary's StationDistribution System (DS)

MWRA Intertie
Surface Water (SW)

EPTDS from MWRAEntry Point to the Distribution System (EP)

Charles River WTP
Ground Water (GW)

EPTDS from Charles River WTPEntry Point to the Distribution System (EP)

Distribution System - SW
Surface Water (SW)

DSMRT for MWRAMaximum Residence Time (MR)

Distribution System - GW
Ground Water (GW)

DSMRT for Charles River WTPMaximum Residence Time (MR)

FAQ

Is Needham Water Dept. tap water safe to drink?

When was Needham Water Dept. last tested for water contamination?

The latest water samples were taken on October 15th, 2024.