M

Montville, CT

—no score

Contamination score

Higher = more contaminated vs. other cities.

⚠️17 health-based violations on record.
0
Water sources
68
Violations
0
Pollution sources
0
Self-reported
0
Lawsuits

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Reported illness & cancer claims

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

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Public water systems

Thompson Hill Water Co - Beechwood Acres

PWSID:
CT0867071
Source:
Ground water
Serves:
77 people

Meadows Apartments

PWSID:
CT0861021
Source:
Ground water
Serves:
301 people

Oakridge Village

PWSID:
CT0860211
Source:
Ground water
Serves:
33 people

Independence Village Elderly Housing

PWSID:
CT0860191
Source:
Ground water
Serves:
55 people

Mountview Apartments

PWSID:
CT0861051
Source:
Ground water
Serves:
105 people

Oakridge Gardens, Llc

PWSID:
CT0860171
Source:
Ground water
Serves:
70 people

Freedom Village Elderly Housing

PWSID:
CT0866301
Source:
Ground water
Serves:
43 people

Fox Laurel Mobile Home Park, Llc

PWSID:
CT0861111
Source:
Ground water
Serves:
40 people

Lakeside Manor Apartments

PWSID:
CT0860091
Source:
Ground water
Serves:
72 people

St. Thomas More School-Main System

PWSID:
CT0861251
Source:
Ground water
Serves:
270 people

St. Thomas More School-The Cove

PWSID:
CT0868011
Source:
Ground water
Serves:
25 people

Kitemaug Orchard Association, Inc.

PWSID:
CT0860041
Source:
Ground water
Serves:
490 people

Montville Water Supply

PWSID:
CT0864011
Source:
Surface water
Serves:
1,300 people

Marina Cove

PWSID:
CT0860141
Source:
Ground water
Serves:
70 people

Scwa, Montville Division (Mtv)

PWSID:
CT0860011
Source:
Ground water
Serves:
2,570 people

Scwa, Seven Oaks (Oak)

PWSID:
CT0869121
Source:
Ground water
Serves:
26 people

Scwa, Mohegan Division

PWSID:
CT0860021
Source:
Ground water
Serves:
1,428 people

Scwa, Oakdale Heights Division

PWSID:
CT0860031
Source:
Ground water
Serves:
876 people

Scwa, Chesterfield Division

PWSID:
CT0860081
Source:
Ground water
Serves:
524 people

Scwa, Hillcrest Division (Hlc)

PWSID:
CT0860131
Source:
Surface water
Serves:
450 people

Scwa, Robin Hill Division (Rbn)

PWSID:
CT0867101
Source:
Ground water
Serves:
388 people

Scwa, Birchwood Division (Bwd)

PWSID:
CT0869011
Source:
Ground water
Serves:
108 people

Deer Run Supply

PWSID:
CT0860051
Source:
Ground water
Serves:
84 people

EPA & DEP violations

Lakeside Manor Apartments

PWSID CT086009130 violations

  • Treatment technique violation — LAKESIDE MANOR APARTMENTS

    high severityHealth-basedOpen

    EPA SDWIS violation 279757 (code 2C) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Treatment technique violation · Began Sep 16, 2025 · 10 months ago · Source ↗

  • Treatment technique violation — LAKESIDE MANOR APARTMENTS

    high severityHealth-basedOpen

    EPA SDWIS violation 279755 (code 2E) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Treatment technique violation · Began Oct 17, 2024 · 1 year ago · Source ↗

  • Reporting violation — LAKESIDE MANOR APARTMENTS

    low severityOpen

    EPA SDWIS violation 279756 (code 4G) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Reporting violation · Began Oct 17, 2024 · 1 year ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279752 (code 72) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Aug 10, 2019 · 7 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279753 (code 71) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Jul 1, 2019 · 7 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279751 (code 72) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Aug 10, 2018 · 8 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279750 (code 71) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Jul 1, 2018 · 8 years ago · Source ↗

  • Monitoring violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279745 (code 3A) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2017 · 8 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279744 (code 71) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Jul 1, 2017 · 9 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279742 (code 72) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Aug 10, 2016 · 10 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279741 (code 71) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Jul 1, 2016 · 10 years ago · Source ↗

  • Monitoring violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279743 (code 66) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Monitoring violation · Began Dec 30, 2015 · 10 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279740 (code 72) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Aug 10, 2015 · 11 years ago · Source ↗

  • Monitoring violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279739 (code 52) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

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

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279738 (code 72) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Aug 10, 2014 · 12 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279737 (code 71) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

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

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279736 (code 75) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Dec 31, 2011 · 14 years ago · Source ↗

  • Monitoring violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279716 (code 34) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Monitoring violation · Began Sep 15, 2010 · 15 years ago · Source ↗

  • Monitoring violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279718 (code 34) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Monitoring violation · Began Jul 13, 2010 · 16 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279712 (code 72) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Aug 10, 2009 · 17 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279606 (code 72) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Aug 10, 2006 · 20 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279506 (code 71) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Jul 1, 2006 · 20 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279205 (code 72) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Aug 10, 2004 · 22 years ago · Source ↗

  • Other violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279105 (code 71) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Other violation · Began Jul 1, 2004 · 22 years ago · Source ↗

  • Monitoring violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 279305 (code 56) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Monitoring violation · Began Jan 1, 2004 · 22 years ago · Source ↗

  • Treatment technique violation — LAKESIDE MANOR APARTMENTS

    high severityHealth-basedResolved

    EPA SDWIS violation 278904 (code 65) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Treatment technique violation · Began Jul 1, 2003 · 23 years ago · Source ↗

  • Treatment technique violation — LAKESIDE MANOR APARTMENTS

    high severityHealth-basedResolved

    EPA SDWIS violation 279004 (code 57) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Treatment technique violation · Began Jan 1, 2003 · 23 years ago · Source ↗

  • Monitoring violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 276002 (code 51) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Monitoring violation · Began Jan 1, 2002 · 24 years ago · Source ↗

  • Monitoring violation — LAKESIDE MANOR APARTMENTS

    low severityResolved

    EPA SDWIS violation 276302 (code 51) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

    EPA SDWIS · Monitoring violation · Began Jul 1, 2001 · 25 years ago · Source ↗

  • Treatment technique violation — LAKESIDE MANOR APARTMENTS

    high severityHealth-basedResolved

    EPA SDWIS violation 275996 (code 57) at LAKESIDE MANOR APARTMENTS (PWSID CT0860091).

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

Deer Run Supply

PWSID CT086005118 violations

  • Treatment technique violation — DEER RUN SUPPLY

    high severityHealth-basedOpen

    EPA SDWIS violation 44439 (code 2E) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Treatment technique violation · Began Oct 17, 2024 · 1 year ago · Source ↗

  • Reporting violation — DEER RUN SUPPLY

    low severityOpen

    EPA SDWIS violation 44440 (code 4G) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Reporting violation · Began Oct 17, 2024 · 1 year ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44438 (code 72) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Aug 10, 2023 · 2 years ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44437 (code 72) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Aug 10, 2022 · 3 years ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44436 (code 71) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Jul 1, 2022 · 4 years ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44432 (code 72) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Aug 10, 2017 · 9 years ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44433 (code 71) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Jul 1, 2017 · 9 years ago · Source ↗

  • Monitoring violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44427 (code 3A) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2016 · 9 years ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44424 (code 72) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Aug 10, 2012 · 14 years ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44422 (code 75) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Jul 21, 2012 · 14 years ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44423 (code 71) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Jul 1, 2012 · 14 years ago · Source ↗

  • Monitoring violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44409 (code 34) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Monitoring violation · Began Mar 29, 2011 · 15 years ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44407 (code 72) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Aug 10, 2007 · 19 years ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44306 (code 72) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Aug 10, 2006 · 20 years ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 44206 (code 71) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Jul 1, 2006 · 20 years ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 43605 (code 72) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Aug 10, 2004 · 22 years ago · Source ↗

  • Other violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 43505 (code 71) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Other violation · Began Jul 1, 2004 · 22 years ago · Source ↗

  • Monitoring violation — DEER RUN SUPPLY

    low severityResolved

    EPA SDWIS violation 43403 (code 52) at DEER RUN SUPPLY (PWSID CT0860051).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2003 · 22 years ago · Source ↗

City-wide

20 violations

  • Revised Total Coliform Rule — TT violation

    high severityHealth-basedResolved

    Revised Total Coliform Rule TT violation (Resolved).

    EPA SDWIS · TT · Began Sep 16, 2025 · 10 months ago · Source ↗

  • Lead and Copper Rule — TT violation

    high severityHealth-basedUnaddressed

    Lead and Copper Rule TT violation (Unaddressed).

    EPA SDWIS · TT · Began Jul 1, 2025 · 1 year ago · Source ↗

  • Lead and Copper Rule — TT violation

    high severityHealth-basedArchived

    Lead and Copper Rule TT violation (Archived).

    EPA SDWIS · TT · Began Jul 1, 2025 · 1 year ago · Source ↗

  • Lead and Copper Rule — TT violation

    high severityHealth-basedUnaddressed

    Lead and Copper Rule TT violation (Unaddressed).

    EPA SDWIS · TT · Began Jun 30, 2025 · 1 year ago · Source ↗

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began Jan 3, 2025 · 1 year ago · Source ↗

  • Lead and Copper Rule — MR violation

    medium severityResolved

    Lead and Copper Rule MR violation (Resolved).

    EPA SDWIS · MR · Began Dec 30, 2024 · 1 year ago · Source ↗

  • Revised Total Coliform Rule — TT violation

    high severityHealth-basedResolved

    Revised Total Coliform Rule TT violation (Resolved).

    EPA SDWIS · TT · Began Dec 21, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedUnaddressed

    LEAD AND COPPER RULE REVISIONS TT violation (Unaddressed).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityUnaddressed

    LEAD AND COPPER RULE REVISIONS RPT violation (Unaddressed).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedUnaddressed

    LEAD AND COPPER RULE REVISIONS TT violation (Unaddressed).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityUnaddressed

    LEAD AND COPPER RULE REVISIONS RPT violation (Unaddressed).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityUnaddressed

    LEAD AND COPPER RULE REVISIONS RPT violation (Unaddressed).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedUnaddressed

    LEAD AND COPPER RULE REVISIONS TT violation (Unaddressed).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityUnaddressed

    LEAD AND COPPER RULE REVISIONS RPT violation (Unaddressed).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedUnaddressed

    LEAD AND COPPER RULE REVISIONS TT violation (Unaddressed).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedUnaddressed

    LEAD AND COPPER RULE REVISIONS TT violation (Unaddressed).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityUnaddressed

    LEAD AND COPPER RULE REVISIONS RPT violation (Unaddressed).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityUnaddressed

    LEAD AND COPPER RULE REVISIONS RPT violation (Unaddressed).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedUnaddressed

    LEAD AND COPPER RULE REVISIONS TT violation (Unaddressed).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityUnaddressed

    LEAD AND COPPER RULE REVISIONS RPT violation (Unaddressed).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.