Wellesley Water Division (MA) Water Quality

Wellesley Water Division is a large public water system in EPA region 1 that provides tap water for the 02481, 02482 zip codes. It has 11 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 18.324 µg/L. The maximum reported level of Manganese was 7.79 µg/L. The maximum reported level of quinoline was 0.0331 µg/L. Some (1 of 10 or 10%) of the latest water samples showed levels of quinoline that were at or above unsafe concentration levels. There were 3 contamintants found in the Wellesley Water Division 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 (10)
1,2,3-trichloropropane (10)
1,3-butadiene (10)
1,4-dioxane (10)
1-butanol (10)
11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (5)
1H,1H,2H,2H-perfluorodecane sulfonic acid (5)
1H,1H,2H,2H-perfluorohexane sulfonic acid (5)
1H,1H,2H,2H-perfluorooctane sulfonic acid (5)
2,4-dinitrotoluene (6)
2,6-dinitrotoluene (6)
2-methoxyethanol (10)
2-propen-1-ol (Allyl Alcohol) (10)
4,4'-dichloro dichlorophenyl ethylene (DDE) (6)
4,8-dioxa-3H-perfluorononanoic acid (5)
9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (5)
alpha-hexachlorocyclohexane (10)
anatoxin-a (8)
bromochloromethane (Halon 1011) (10)
bromomethane (10)
Butylated Hydroxyanisole (10)
chlorate (20)
chlorodifluoromethane (HCFC-22) (10)
chloromethane (10)
chlorpyrifos (10)
chromium (20)
chromium-6 (20)
cobalt (20)
cylindrospermopsin (8)
dimethipin (10)
dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (6)
ethoprop (10)
Germanium (10)
HAA5 (five regulated haloacetic acids) (16)
HAA6Br (six brominated haloacetic acids) (16)
HAA9 (nine haloacetic acids) (16)
hexafluoropropylene oxide dimer acid (GenX) (5)
lithium (5)
Manganese (10)
methyl-tertiary-butyl-ether (MTBE) (6)
molinate (6)
molybdenum (20)
N-ethyl perfluorooctanesulfonamidoacetic acid (5)
N-methyl perfluorooctanesulfonamidoacetic acid (5)
nitrobenzene (6)
nonafluoro-3,6-dioxaheptanoic acid (5)
o-toluidine (10)
oxyfluorfen (10)
perchlorate (6)
perfluoro(2-ethoxyethane)sulfonic acid (5)
perfluoro-3-methoxypropanoic acid (5)
perfluoro-4-methoxybutanoic acid (5)
perfluorobutanesulfonic acid (15)
perfluorobutanoic acid (5)
perfluorodecanoic acid (5)
perfluorododecanoic acid (5)
perfluoroheptanesulfonic acid (5)
perfluoroheptanoic acid (15)
perfluorohexanesulfonic acid (15)
perfluorohexanoic acid (5)
perfluorononanoic acid (15)
perfluorooctanesulfonic acid (15)
perfluorooctanoic acid (15)
perfluoropentanesulfonic acid (5)
perfluoropentanoic acid (5)
perfluorotetradecanoic acid (5)
perfluorotridecanoic acid (5)
perfluoroundecanoic acid (5)
profenofos (10)
quinoline (10)
s-ethyl-dipropylthiocarbamate (EPTC) (6)
strontium (20)
tebuconazole (10)
terbacil (6)
total microcystins (8)
Total Permethrin (10)
tribufos (10)
vanadium (20)

1,1-dichloroethane (10)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

1,2,3-trichloropropane (10)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

1,3-butadiene (10)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.1 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.1 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.1 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.1 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.1 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.1 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.1 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.1 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.1 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.1 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

1,4-dioxane (10)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.07 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.07 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.07 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.07 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.07 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.07 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.07 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.07 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.07 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.07 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

1-butanol (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<2 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<2 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<2 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<2 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<2 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<2 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<2 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<2 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<2 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

1H,1H,2H,2H-perfluorodecane sulfonic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

1H,1H,2H,2H-perfluorohexane sulfonic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

1H,1H,2H,2H-perfluorooctane sulfonic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

2,4-dinitrotoluene (6)

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<2 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<2 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<2 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<2 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<2 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<2 µg/L

Below Reporting Level

1/16/2002

23 years ago

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

Contaminant Details

2,6-dinitrotoluene (6)

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<2 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<2 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<2 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<2 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<2 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<2 µg/L

Below Reporting Level

1/16/2002

23 years ago

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

Contaminant Details

2-methoxyethanol (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.4 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.4 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.4 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.4 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.4 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.4 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.4 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.4 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.4 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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) (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.5 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.5 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.5 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.5 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.5 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.5 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.5 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.5 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.5 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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) (6)

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.8 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.8 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.8 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.8 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.8 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.8 µg/L

Below Reporting Level

1/16/2002

23 years ago

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

Contaminant Details

4,8-dioxa-3H-perfluorononanoic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.002 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.002 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.002 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.002 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.002 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

alpha-hexachlorocyclohexane (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.01 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.01 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.01 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.01 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.01 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.01 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.01 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.01 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.01 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

10/15/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

9/23/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

9/9/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

8/28/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

8/13/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

7/16/2020

5 years ago

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

Contaminant Details

bromochloromethane (Halon 1011) (10)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.06 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.06 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.06 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.06 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.06 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.06 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.06 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.06 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.06 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.06 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

bromomethane (10)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

Butylated Hydroxyanisole (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 (20)

DSMRT for MWRA

Distribution System - SW ℹ️

141 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 121 µg/L

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

79.2 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 59.2 µg/L

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

158 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 138 µg/L

7/23/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

151 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 131 µg/L

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

133 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 113 µg/L

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

131 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 111 µg/L

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

97.5 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 77.5 µg/L

7/23/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

97 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 77 µg/L

7/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

96.5 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 76.5 µg/L

7/23/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

96.3 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 76.3 µg/L

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

79.3 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 59.3 µg/L

4/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

34.3 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 14.3 µg/L

4/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

85.6 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 65.6 µg/L

1/22/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

76.8 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 56.8 µg/L

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

63 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 43 µg/L

1/22/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

47.6 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 27.6 µg/L

1/22/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

42.1 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 22.1 µg/L

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

40.9 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 20.9 µg/L

1/22/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

39.9 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 19.9 µg/L

1/22/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

36.9 µg/L

⚠️ Exceeds Reporting Level of 20 µg/L by 16.9 µg/L

1/22/2014

11 years ago

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

Contaminant Details

chlorodifluoromethane (HCFC-22) (10)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.08 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.08 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.08 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.08 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.08 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.08 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.08 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.08 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.08 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.08 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

chloromethane (10)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

chlorpyrifos (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 (20)

EPTDS from MWRA

MWRA Intertie ℹ️

0.31 µg/L

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

10/21/2014

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

0.3 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.1 µg/L

10/21/2014

10 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

0.3 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.1 µg/L

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

0.28 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.08 µg/L

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

0.25 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.05 µg/L

7/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

0.23 µg/L

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

7/23/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

0.23 µg/L

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

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

0.22 µg/L

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

7/23/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

0.21 µg/L

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

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

0.27 µg/L

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

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

0.24 µg/L

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

4/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

0.35 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.15 µg/L

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

0.34 µg/L

⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.14 µg/L

1/22/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

0.29 µg/L

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

1/22/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

0.29 µg/L

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

1/22/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

0.27 µg/L

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

1/22/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

0.27 µg/L

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

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

0.24 µg/L

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

1/22/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

0.22 µg/L

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

1/22/2014

11 years ago

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

Contaminant Details

chromium-6 (20)

DSMRT for MWRA

Distribution System - SW ℹ️

0.11 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.08 µg/L

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

0.068 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.038 µg/L

10/21/2014

10 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

0.1 µg/L

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

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

0.089 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.059 µg/L

7/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

0.085 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.055 µg/L

7/23/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

0.081 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.051 µg/L

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

0.077 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.047 µg/L

7/23/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

0.075 µg/L

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

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

0.066 µg/L

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

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

0.098 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.068 µg/L

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

0.082 µg/L

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

4/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

0.12 µg/L

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

1/22/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

0.11 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.08 µg/L

1/22/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

0.078 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.048 µg/L

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

0.075 µg/L

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

1/22/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

0.075 µg/L

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

1/22/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

0.067 µg/L

⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.037 µg/L

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

0.06 µg/L

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

1/22/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

cobalt (20)

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

10/21/2014

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

4/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

cylindrospermopsin (8)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.09 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.09 µg/L

Below Reporting Level

10/15/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.09 µg/L

Below Reporting Level

9/23/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.09 µg/L

Below Reporting Level

9/9/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.09 µg/L

Below Reporting Level

8/28/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.09 µg/L

Below Reporting Level

8/13/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.09 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.09 µg/L

Below Reporting Level

7/16/2020

5 years ago

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

Contaminant Details

dimethipin (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.2 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.2 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.2 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 (6)

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<1 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<1 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<1 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<1 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<1 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<1 µg/L

Below Reporting Level

1/16/2002

23 years ago

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

Contaminant Details

ethoprop (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.3 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.3 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.3 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.3 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.3 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 - 888 Worcester Street

MWRA Connection ℹ️

18.286 µg/L

Meets Reporting Threshold

12/16/2020

4 years ago

DSDBP - Central Fire Station

MWRA Connection ℹ️

9.518 µg/L

Meets Reporting Threshold

12/16/2020

4 years ago

DSDBP - Dale Street Pump Station

MWRA Connection ℹ️

7.37 µg/L

Meets Reporting Threshold

12/16/2020

4 years ago

DSDBP - RDF

MWRA Connection ℹ️

4.66 µg/L

Meets Reporting Threshold

12/16/2020

4 years ago

DSDBP - Dale Street Pump Station

MWRA Connection ℹ️

8.555 µg/L

Meets Reporting Threshold

11/17/2020

4 years ago

DSDBP - 888 Worcester Street

MWRA Connection ℹ️

18.324 µg/L

Meets Reporting Threshold

8/27/2020

5 years ago

DSDBP - Central Fire Station

MWRA Connection ℹ️

15.275 µg/L

Meets Reporting Threshold

8/27/2020

5 years ago

DSDBP - RDF

MWRA Connection ℹ️

5.474 µg/L

Meets Reporting Threshold

8/27/2020

5 years ago

DSDBP - 888 Worcester Street

MWRA Connection ℹ️

16.485 µg/L

Meets Reporting Threshold

5/27/2020

5 years ago

DSDBP - RDF

MWRA Connection ℹ️

11.144 µg/L

Meets Reporting Threshold

5/27/2020

5 years ago

DSDBP - Dale Street Pump Station

MWRA Connection ℹ️

10.131 µg/L

Meets Reporting Threshold

5/27/2020

5 years ago

DSDBP - Central Fire Station

MWRA Connection ℹ️

9.424 µg/L

Meets Reporting Threshold

5/27/2020

5 years ago

DSDBP - RDF

MWRA Connection ℹ️

11.043 µg/L

Meets Reporting Threshold

2/25/2020

5 years ago

DSDBP - 888 Worcester Street

MWRA Connection ℹ️

10.217 µg/L

Meets Reporting Threshold

2/25/2020

5 years ago

DSDBP - Dale Street Pump Station

MWRA Connection ℹ️

7.864 µg/L

Meets Reporting Threshold

2/25/2020

5 years ago

DSDBP - Central Fire Station

MWRA Connection ℹ️

7.313 µg/L

Meets Reporting Threshold

2/25/2020

5 years ago

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

Contaminant Details

HAA6Br (six brominated haloacetic acids) (16)

DSDBP - 888 Worcester Street

MWRA Connection ℹ️

21.176 µg/L

12/16/2020

4 years ago

DSDBP - Central Fire Station

MWRA Connection ℹ️

14.298 µg/L

12/16/2020

4 years ago

DSDBP - Dale Street Pump Station

MWRA Connection ℹ️

11.8 µg/L

12/16/2020

4 years ago

DSDBP - RDF

MWRA Connection ℹ️

5.676 µg/L

12/16/2020

4 years ago

DSDBP - Dale Street Pump Station

MWRA Connection ℹ️

17.245 µg/L

11/17/2020

4 years ago

DSDBP - Central Fire Station

MWRA Connection ℹ️

15.155 µg/L

8/27/2020

5 years ago

DSDBP - 888 Worcester Street

MWRA Connection ℹ️

13.038 µg/L

8/27/2020

5 years ago

DSDBP - RDF

MWRA Connection ℹ️

7.084 µg/L

8/27/2020

5 years ago

DSDBP - RDF

MWRA Connection ℹ️

26.374 µg/L

5/27/2020

5 years ago

DSDBP - 888 Worcester Street

MWRA Connection ℹ️

22.245 µg/L

5/27/2020

5 years ago

DSDBP - Dale Street Pump Station

MWRA Connection ℹ️

17.991 µg/L

5/27/2020

5 years ago

DSDBP - Central Fire Station

MWRA Connection ℹ️

16.784 µg/L

5/27/2020

5 years ago

DSDBP - RDF

MWRA Connection ℹ️

22.383 µg/L

2/25/2020

5 years ago

DSDBP - 888 Worcester Street

MWRA Connection ℹ️

15.647 µg/L

2/25/2020

5 years ago

DSDBP - Dale Street Pump Station

MWRA Connection ℹ️

12.484 µg/L

2/25/2020

5 years ago

DSDBP - Central Fire Station

MWRA Connection ℹ️

12.183 µg/L

2/25/2020

5 years ago

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

Contaminant Details

HAA9 (nine haloacetic acids) (16)

DSDBP - 888 Worcester Street

MWRA Connection ℹ️

35.506 µg/L

12/16/2020

4 years ago

DSDBP - Central Fire Station

MWRA Connection ℹ️

21.418 µg/L

12/16/2020

4 years ago

DSDBP - Dale Street Pump Station

MWRA Connection ℹ️

17.82 µg/L

12/16/2020

4 years ago

DSDBP - RDF

MWRA Connection ℹ️

10.336 µg/L

12/16/2020

4 years ago

DSDBP - Dale Street Pump Station

MWRA Connection ℹ️

24.465 µg/L

11/17/2020

4 years ago

DSDBP - Central Fire Station

MWRA Connection ℹ️

28.035 µg/L

8/27/2020

5 years ago

DSDBP - 888 Worcester Street

MWRA Connection ℹ️

27.958 µg/L

8/27/2020

5 years ago

DSDBP - RDF

MWRA Connection ℹ️

12.004 µg/L

8/27/2020

5 years ago

DSDBP - 888 Worcester Street

MWRA Connection ℹ️

35.315 µg/L

5/27/2020

5 years ago

DSDBP - RDF

MWRA Connection ℹ️

31.634 µg/L

5/27/2020

5 years ago

DSDBP - Dale Street Pump Station

MWRA Connection ℹ️

25.891 µg/L

5/27/2020

5 years ago

DSDBP - Central Fire Station

MWRA Connection ℹ️

23.924 µg/L

5/27/2020

5 years ago

DSDBP - RDF

MWRA Connection ℹ️

28.293 µg/L

2/25/2020

5 years ago

DSDBP - 888 Worcester Street

MWRA Connection ℹ️

22.897 µg/L

2/25/2020

5 years ago

DSDBP - Dale Street Pump Station

MWRA Connection ℹ️

18.234 µg/L

2/25/2020

5 years ago

DSDBP - Central Fire Station

MWRA Connection ℹ️

17.313 µg/L

2/25/2020

5 years ago

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

Contaminant Details

hexafluoropropylene oxide dimer acid (GenX) (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

lithium (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<9 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<9 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<9 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<9 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<9 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

Manganese (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

5.1 µg/L

Meets Reporting Threshold

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

4.49 µg/L

Meets Reporting Threshold

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

2.67 µg/L

Meets Reporting Threshold

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

1.14 µg/L

Meets Reporting Threshold

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

0.52 µg/L

Meets Reporting Threshold

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

7.79 µg/L

Meets Reporting Threshold

4/21/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

6.87 µg/L

Meets Reporting Threshold

1/27/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

3.26 µg/L

Meets Reporting Threshold

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

0.622 µg/L

Meets Reporting Threshold

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

0.44 µg/L

Meets Reporting Threshold

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) (6)

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<5 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<5 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<5 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<5 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<5 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<5 µg/L

Below Reporting Level

1/16/2002

23 years ago

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

Contaminant Details

molinate (6)

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.9 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.9 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.9 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.9 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.9 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.9 µg/L

Below Reporting Level

1/16/2002

23 years ago

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

Contaminant Details

molybdenum (20)

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

10/21/2014

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

4/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

<1 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

N-ethyl perfluorooctanesulfonamidoacetic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

N-methyl perfluorooctanesulfonamidoacetic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.006 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.006 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.006 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.006 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.006 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

nitrobenzene (6)

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<10 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<10 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<10 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<10 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<10 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<10 µg/L

Below Reporting Level

1/16/2002

23 years ago

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

Contaminant Details

nonafluoro-3,6-dioxaheptanoic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.02 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.02 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

o-toluidine (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.007 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

0.0207 µg/L

⚠️ Exceeds Reporting Level of 0.007 µg/L by 0.0137 µg/L

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.007 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.007 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.007 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.007 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.007 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.007 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.007 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.05 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.05 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.05 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.05 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.05 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.05 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.05 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.05 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.05 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 (6)

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<4 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<4 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<4 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<4 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<4 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<4 µg/L

Below Reporting Level

1/16/2002

23 years ago

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

Contaminant Details

perfluoro(2-ethoxyethane)sulfonic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

perfluoro-3-methoxypropanoic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

perfluoro-4-methoxybutanoic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

perfluorobutanesulfonic acid (15)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

0.0046 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0016 µg/L

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

0.0037 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0007 µg/L

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.09 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.09 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.09 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.09 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.09 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.09 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.09 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.09 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.09 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.09 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

perfluorobutanoic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.005 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

perfluorodecanoic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

perfluorododecanoic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

perfluoroheptanesulfonic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

perfluoroheptanoic acid (15)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.01 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.01 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.01 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.01 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.01 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.01 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.01 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.01 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.01 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.01 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

perfluorohexanesulfonic acid (15)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.03 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

perfluorohexanoic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

0.0039 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0009 µg/L

1/21/2025

7 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

perfluorononanoic acid (15)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.02 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.02 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.02 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

perfluorooctanesulfonic acid (15)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

0.0064 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.0024 µg/L

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.04 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.04 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.04 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.04 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.04 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.04 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.04 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.04 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.04 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.04 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

perfluorooctanoic acid (15)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

0.0063 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.0023 µg/L

1/21/2025

7 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

0.0052 µg/L

⚠️ Exceeds Reporting Level of 0.004 µg/L by 0.0012 µg/L

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.02 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.02 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.02 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.02 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

perfluoropentanesulfonic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.004 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

perfluoropentanoic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

0.0035 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0005 µg/L

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

0.0035 µg/L

⚠️ Exceeds Reporting Level of 0.003 µg/L by 0.0005 µg/L

1/21/2025

7 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.003 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

perfluorotetradecanoic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.008 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.008 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.008 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.008 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.008 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

perfluorotridecanoic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.007 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.007 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.007 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.007 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.007 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

perfluoroundecanoic acid (5)

Entry Point to Dist. System

MWRA Connection ℹ️

<0.002 µg/L

Below Reporting Level

4/16/2025

5 months ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.002 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.002 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.002 µg/L

Below Reporting Level

1/21/2025

7 months ago

Entry Point to Dist. System

MWRA Connection ℹ️

<0.002 µg/L

Below Reporting Level

1/21/2025

7 months ago

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

Contaminant Details

profenofos (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.3 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.3 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.3 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.3 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.3 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.02 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.02 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

0.0331 µg/L

☠️ Exceeds Reference Level by 0.0231 µg/L

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.02 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.02 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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) (6)

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<1 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<1 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<1 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<1 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<1 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<1 µg/L

Below Reporting Level

1/16/2002

23 years ago

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

Contaminant Details

strontium (20)

DSMRT for MWRA

Distribution System - SW ℹ️

213 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 212.7 µg/L

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

192 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 191.7 µg/L

10/21/2014

10 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

229 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 228.7 µg/L

7/23/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

207 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 206.7 µg/L

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

206 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 205.7 µg/L

7/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

174 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 173.7 µg/L

7/23/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

164 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 163.7 µg/L

7/23/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

162 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 161.7 µg/L

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

160 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 159.7 µg/L

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

35 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 34.7 µg/L

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

207 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 206.7 µg/L

4/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

161 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 160.7 µg/L

4/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

228 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 227.7 µg/L

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

222 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 221.7 µg/L

1/22/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

220 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 219.7 µg/L

1/22/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

217 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 216.7 µg/L

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

197 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 196.7 µg/L

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

184 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 183.7 µg/L

1/22/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

176 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 175.7 µg/L

1/22/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

36.1 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 35.8 µg/L

1/22/2014

11 years ago

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

Contaminant Details

tebuconazole (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.2 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.2 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.2 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 (6)

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<2 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<2 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<2 µg/L

Below Reporting Level

6/10/2002

23 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<2 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<2 µg/L

Below Reporting Level

1/16/2002

23 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<2 µg/L

Below Reporting Level

1/16/2002

23 years ago

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

Contaminant Details

total microcystins (8)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

10/15/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

9/23/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

9/9/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

8/28/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

8/13/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.3 µg/L

Below Reporting Level

7/16/2020

5 years ago

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

Contaminant Details

Total Permethrin (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.04 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.04 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.04 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.04 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.04 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.04 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.04 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.04 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.04 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 (10)

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.07 µg/L

Below Reporting Level

10/29/2020

4 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.07 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.07 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.07 µg/L

Below Reporting Level

7/29/2020

5 years ago

Entry Point to Dist. System

Morses Pond WTP ℹ️

<0.07 µg/L

Below Reporting Level

7/29/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.07 µg/L

Below Reporting Level

4/21/2020

5 years ago

EPTDS - WY-07, Schofield School - Meter 203

MWRA CONNECTION ℹ️

<0.07 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Longfellow Pond WTP ℹ️

<0.07 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Wellesley Avenue WTP ℹ️

<0.07 µg/L

Below Reporting Level

1/27/2020

5 years ago

Entry Point to Dist. System

Morses Pond 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 (20)

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

10/21/2014

10 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

10/21/2014

10 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

<0.2 µg/L

Below Reporting Level

7/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

4/23/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

4/23/2014

11 years ago

EPTDS from MWRA

MWRA Intertie ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Longfellow WTP

Longfellow WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from T.F. Coughlin WTP

T.F. Coughlin WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

EPTDS from Morses Pond WTP

Morses Pond WTP ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

DSMRT for MWRA

Distribution System - SW ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

DSMRT for Longfellow WTP

Distribution System - GW ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

DSMRT for T.F. Coughlin WTP

Distribution System - GW ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

DSMRT for Morses Pond WTP

Distribution System - GW ℹ️

<0.2 µg/L

Below Reporting Level

1/22/2014

11 years ago

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

Contaminant Details

Sampling Facilities

Longfellow Pond WTP
Ground Water (GW)

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

Wellesley Avenue WTP
Ground Water (GW)

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

Morses Pond WTP
Ground Water (GW)

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

MWRA Connection
Surface Water (SW)

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

DSDBP - 888 Worcester StreetDistribution System (DS)

DSDBP - Dale Street Pump StationDistribution System (DS)

DSDBP - Central Fire StationDistribution System (DS)

DSDBP - RDFDistribution System (DS)

MWRA CONNECTION
Surface Water (SW)

EPTDS - WY-07, Schofield School - Meter 203Entry Point to the Distribution System (EP)

MWRA Intertie
Surface Water (SW)

EPTDS from MWRAEntry Point to the Distribution System (EP)

Longfellow WTP
Ground Water (GW)

EPTDS from Longfellow WTPEntry Point to the Distribution System (EP)

T.F. Coughlin WTP
Ground Water (GW)

EPTDS from T.F. Coughlin WTPEntry Point to the Distribution System (EP)

Morses Pond WTP
Ground Water (GW)

EPTDS from Morses Pond 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 Longfellow WTPMaximum Residence Time (MR)

DSMRT for T.F. Coughlin WTPMaximum Residence Time (MR)

DSMRT for Morses Pond WTPMaximum Residence Time (MR)

FAQ

Is Wellesley Water Division tap water safe to drink?

When was Wellesley Water Division last tested for water contamination?

The latest water samples were taken on April 16th, 2025.