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Tap water quality report

West Groton Water Supply District

EPA monitoring tested this supplier for 74 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

74
contaminants tested
10
detected
1,853
people served
10
health-based violations
Massachusetts rankingsLead in MassachusettsPFAS in Massachusetts
Water source
Ground water
Ownership
Local government
Counties served
Middlesex

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

10
health-based violations
53
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2012-11-01 → 2012-11-30
MCL Health-based Resolved 2012-11-01 → 2012-11-30
MCL Health-based Resolved 2012-10-01 → 2012-10-31
MCL Health-based Resolved 2012-10-01 → 2012-10-31
MCL Health-based Resolved 2012-06-01 → 2012-06-30
MCL Health-based Resolved 2012-06-01 → 2012-06-30
MCL Health-based Resolved 2011-09-01 → 2011-09-30
MCL Health-based Resolved 2011-09-01 → 2011-09-30
MCL Health-based Resolved 2010-11-01 → 2010-11-30
MCL Health-based Resolved 2010-11-01 → 2010-11-30

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
110 µg/L 8.5%
of the EPA limit 1300 µg/L
worst single sample: 140 µg/L
21/23 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 19/19 LCR 2024
Nitrate
560 µg/L 5.6%
of the EPA limit 10000 µg/L
 18/32 SYR4 2012–2019
Arsenic
5.4 µg/L 54%
of the EPA limit 10 µg/L
worst single sample: 6 µg/L
7/7 SYR4 2012–2019
Barium
3 µg/L 0.2%
of the EPA limit 2000 µg/L
 5/7 SYR4 2012–2019
TTHM
1.07 µg/L 1.3%
of the EPA limit 80 µg/L
worst single sample: 1.1 µg/L
2/8 SYR4 2013–2019
Bromoform
0.5100 µg/L
No EPA limit set
 1/7 SYR4 2014–2019
Dibromochloromethane
0.5900 µg/L
No EPA limit set
 1/7 SYR4 2014–2019
Monobromoacetic Acid
1.14 µg/L
No EPA limit set
 1/7 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
1.14 µg/L 1.9%
of the EPA limit 60 µg/L
 1/8 SYR4 2013–2019
64 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneFluorideHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
PAUL W CURTIN
Phone
9784483711
Email
[email protected]

Frequently asked questions about West Groton Water Supply District

Is West Groton Water Supply District tap water safe to drink?

EPA monitoring detected 10 contaminants in West Groton Water Supply District's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in West Groton Water Supply District's water?

EPA monitoring detected Copper, Lead, Nitrate, Arsenic, Barium, and others. The full list with the level and data source for each is above.

How many people does West Groton Water Supply District serve?

West Groton Water Supply District reports serving 1,853 people in Massachusetts, per its EPA record.

Has West Groton Water Supply District had any water quality violations?

The EPA has 53 violations on file for West Groton Water Supply District, of which 10 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.