A

Acton, MA

Middlesex County CountyPop. 24,000Source: Acton Water District (municipal groundwater wells)
C58/100

Contamination score

Higher = more contaminated vs. other cities.

Acton, Massachusetts has two documented drinking-water contamination episodes. In 1978, two municipal supply wells (Assabet 1A and 2A) were found contaminated with industrial solvents including trichloroethylene (TCE) and 1,1-dichloroethylene, traced to the nearby W.R. Grace & Co. plant, leading to a 1983 EPA Superfund (National Priorities List) designation and a 1980 consent decree requiring decades of groundwater remediation. More recently, MassDEP recorded a PFAS6 maximum-contaminant-level exceedance at the North Acton Water Treatment Plant for the third quarter of 2023, prompting the district to disable high-PFAS sources and adjust well pumping schedules; facilities serving roughly 93% of customers remained in compliance.

⚠️16 health-based violations on record. 1 pollution source mapped near this water supply.
0
Water sources
31
Violations
1
Pollution sources
0
Self-reported
0
Lawsuits

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Reported illness & cancer claims

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Pollution sources & reported claims near your water

Factories, greenhouses, and contaminated sites mapped around the water supply. Tap any circle for detail.

Critical High Medium Reported claim

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Public water systems

Acton Water Supply District

PWSID:
MA2002000
Source:
Surface water
Serves:
21,285 people

Pine Hill Condominium

PWSID:
MA2002010
Source:
Ground water
Serves:
95 people

Acton Water System

PWSID:
GEN-acton-massachusetts

EPA & DEP violations

Acton Water Supply District

PWSID MA200200012 violations

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Mar 1, 2024 · 2 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Dec 1, 2014 · 11 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Oct 1, 2014 · 11 years ago · Source ↗

  • Surface Water Treatment Rule — MR violation

    medium severityResolved

    Surface Water Treatment Rule MR violation (Resolved).

    EPA SDWIS · MR · Began Aug 1, 2014 · 12 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Jul 1, 2014 · 12 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Nov 1, 2013 · 12 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Sep 1, 2012 · 13 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Aug 1, 2011 · 15 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Jun 1, 2011 · 15 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Oct 1, 2010 · 15 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Apr 1, 2010 · 16 years ago · Source ↗

  • Violation — Violation violation

    medium severity

    Contaminant Violation violation.

    EPA SDWIS · Violation · Began — · Source ↗

Pine Hill Condominium

PWSID MA200201012 violations

  • MCL exceedance — PINE HILL CONDOMINIUM

    high severityHealth-basedResolved

    EPA SDWIS violation 15 (code 02) at PINE HILL CONDOMINIUM (PWSID MA2002010).

    EPA SDWIS · MCL exceedance · Began Oct 1, 2019 · 6 years ago · Source ↗

  • Monitoring violation — PINE HILL CONDOMINIUM

    low severityResolved

    EPA SDWIS violation 8 (code 52) at PINE HILL CONDOMINIUM (PWSID MA2002010).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2006 · 19 years ago · Source ↗

  • Other violation — PINE HILL CONDOMINIUM

    low severityResolved

    EPA SDWIS violation 00V0002 (code 71) at PINE HILL CONDOMINIUM (PWSID MA2002010).

    EPA SDWIS · Other violation · Began Jul 1, 2000 · 26 years ago · Source ↗

  • Monitoring violation — PINE HILL CONDOMINIUM

    low severityResolved

    EPA SDWIS violation 01V0114 (code 52) at PINE HILL CONDOMINIUM (PWSID MA2002010).

    EPA SDWIS · Monitoring violation · Began Jan 1, 2000 · 26 years ago · Source ↗

  • Monitoring violation — PINE HILL CONDOMINIUM

    low severityResolved

    EPA SDWIS violation 99V0071 (code 52) at PINE HILL CONDOMINIUM (PWSID MA2002010).

    EPA SDWIS · Monitoring violation · Began Jan 1, 1999 · 27 years ago · Source ↗

  • Monitoring violation — PINE HILL CONDOMINIUM

    low severityResolved

    EPA SDWIS violation 99V0003 (code 52) at PINE HILL CONDOMINIUM (PWSID MA2002010).

    EPA SDWIS · Monitoring violation · Began Jul 1, 1998 · 28 years ago · Source ↗

  • Monitoring violation — PINE HILL CONDOMINIUM

    low severityResolved

    EPA SDWIS violation 98V0071 (code 52) at PINE HILL CONDOMINIUM (PWSID MA2002010).

    EPA SDWIS · Monitoring violation · Began Jul 1, 1997 · 29 years ago · Source ↗

  • Monitoring violation — PINE HILL CONDOMINIUM

    low severityResolved

    EPA SDWIS violation 98V0004 (code 52) at PINE HILL CONDOMINIUM (PWSID MA2002010).

    EPA SDWIS · Monitoring violation · Began Jul 1, 1996 · 30 years ago · Source ↗

  • Monitoring violation — PINE HILL CONDOMINIUM

    low severityResolved

    EPA SDWIS violation 97V0003 (code 52) at PINE HILL CONDOMINIUM (PWSID MA2002010).

    EPA SDWIS · Monitoring violation · Began Jul 1, 1995 · 31 years ago · Source ↗

  • Monitoring violation — PINE HILL CONDOMINIUM

    low severityResolved

    EPA SDWIS violation 97V0002 (code 52) at PINE HILL CONDOMINIUM (PWSID MA2002010).

    EPA SDWIS · Monitoring violation · Began Jul 1, 1994 · 32 years ago · Source ↗

  • Monitoring violation — PINE HILL CONDOMINIUM

    low severityResolved

    EPA SDWIS violation 97V0001 (code 52) at PINE HILL CONDOMINIUM (PWSID MA2002010).

    EPA SDWIS · Monitoring violation · Began Jan 1, 1994 · 32 years ago · Source ↗

  • Monitoring violation — PINE HILL CONDOMINIUM

    low severityResolved

    EPA SDWIS violation 96V0001 (code 51) at PINE HILL CONDOMINIUM (PWSID MA2002010).

    EPA SDWIS · Monitoring violation · Began Jul 1, 1993 · 33 years ago · Source ↗

Acton Water System

PWSID GEN-acton-massachusetts2 violations

  • PFAS6 maximum contaminant level exceedance at North Acton Water Treatment Plant

    medium severityHealth-basedAddressed via operational changes; other facilities (~93% of supply) remained in compliance

    Q3 2023 quarterly-average PFAS6 sampling results exceeded the Massachusetts MCL at the North Acton Water Treatment Plant. The district responded by disabling high-PFAS sources, blending supply from multiple wells, and adjusting pumping schedules.

    Massachusetts DEP · MCL exceedance - PFAS6 · Began Sep 30, 2023 · 2 years ago

  • W.R. Grace & Co. (Acton Plant) Superfund Site

    high severityHealth-basedLong-term remediation completed for major source areas; ongoing groundwater monitoring

    Two Acton municipal wells were found contaminated with industrial solvents in 1978, traced to the W.R. Grace plant; EPA listed the site on the National Priorities List in 1983 and required cleanup under a 1980 Consent Decree.

    EPA · Superfund NPL listing / groundwater contamination · Began Sep 1, 1983 · 42 years ago

City-wide

5 violations

  • Combined Radium (-226 and -228) — MCL violation

    high severityHealth-basedResolved

    Combined Radium (-226 and -228) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Oct 1, 2019 · 6 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Sep 1, 2012 · 13 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Aug 1, 2012 · 14 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Jul 1, 2011 · 15 years ago · Source ↗

  • Violation — Violation violation

    medium severity

    Contaminant Violation violation.

    EPA SDWIS · Violation · Began — · Source ↗

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.