Water Quality in GUILFORD, CT (06437)

EPA violation data for public water systems serving ZIP code 06437.

158

Total Violations

Health-Based

151

Monitoring / Reporting

144

Resolved

What does this mean?

144 of 158 violations have been resolved. 7 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 151 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.

Water systems: 90 Population served: 4,032

Violations Detail (158 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Public Notice	Monitoring	N/A	N/A	Aug 28, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jun 7, 2025	Active	N/A
Public Notice	Monitoring	N/A	N/A	Jun 7, 2025	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
E. COLI	Monitoring	0	N/A	Mar 31, 2025	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2024	Active	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2024	Active	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2024	Active	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 29, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
LEAD AND COPPER RULE REVISIONS	Health-Based	N/A	N/A	Oct 16, 2024	Active	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 2024	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jul 7, 2024	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 3, 2024	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 3, 2024	Active	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Mar 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jan 28, 2024	Active	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jan 28, 2024	Active	N/A
E. COLI	Monitoring	0	N/A	Jan 2, 2024	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jan 2, 2024	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 29, 2022	Resolved	N/A
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,2-Dichloropropane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Styrene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Styrene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Benzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Anemia; decrease in blood platelets; increased risk of cancer
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Carbon tetrachloride	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Liver problems; increased risk of cancer
Carbon tetrachloride	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Liver problems; increased risk of cancer
Carbon tetrachloride	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Liver problems; increased risk of cancer
Carbon tetrachloride	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Liver problems; increased risk of cancer
Tetrachloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Liver problems; increased risk of cancer
Tetrachloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Liver problems; increased risk of cancer
Tetrachloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Liver problems; increased risk of cancer
Tetrachloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Liver problems; increased risk of cancer
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Trichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Liver problems; increased risk of cancer
Trichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Liver problems; increased risk of cancer
Trichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Liver problems; increased risk of cancer
Styrene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
DICHLOROMETHANE	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
DICHLOROMETHANE	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
DICHLOROMETHANE	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
o-Dichlorobenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
o-Dichlorobenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
o-Dichlorobenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
o-Dichlorobenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,1-Dichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,1-Dichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,1-Dichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,1-Dichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,2-Dichloroethane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,2-Dichloroethane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,2-Dichloroethane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,2-Dichloroethane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,1,2-Trichloroethane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,1,2-Trichloroethane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,1,2-Trichloroethane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,1,2-Trichloroethane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Toluene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Toluene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Toluene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Toluene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Ethylbenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Ethylbenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Ethylbenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Ethylbenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Styrene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Trichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Liver problems; increased risk of cancer
1,2-Dichloropropane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
CHLOROBENZENE	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
CHLOROBENZENE	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
CHLOROBENZENE	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
CHLOROBENZENE	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Benzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Anemia; decrease in blood platelets; increased risk of cancer
Benzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Anemia; decrease in blood platelets; increased risk of cancer
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Benzene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Anemia; decrease in blood platelets; increased risk of cancer
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Vinyl chloride	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Increased risk of cancer
Vinyl chloride	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Increased risk of cancer
Vinyl chloride	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Increased risk of cancer
Vinyl chloride	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Increased risk of cancer
1,2-Dichloropropane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
1,2-Dichloropropane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
DICHLOROMETHANE	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Sep 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 28, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 28, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Mar 16, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Mar 16, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 28, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Sep 24, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Sep 24, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jun 16, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jun 16, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A

Lead & Copper Levels

Violation Timeline

2025(11)

Public Notice

Aug 28Resolved

Revised Total Coliform Rule

Jul 31Resolved

Public Notice

Jun 7Active

Public Notice

Jun 7Active

Revised Total Coliform Rule

Apr 30Resolved

Lead and Copper Rule

Mar 31Resolved

Revised Total Coliform Rule

Mar 31Resolved

E. COLI

Mar 31Resolved

Revised Total Coliform Rule

Mar 31Resolved

Revised Total Coliform Rule

Feb 28Resolved

Revised Total Coliform Rule

Jan 31Resolved

2024(46)

Lead and Copper Rule

Dec 31Active

Lead and Copper Rule

Dec 31Active

Lead and Copper Rule

Dec 31Active

Lead and Copper Rule

Dec 29Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

LEAD AND COPPER RULE REVISIONS

Oct 16Active

LEAD AND COPPER RULE REVISIONS

Oct 16Active

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Aug 31Resolved

Revised Total Coliform Rule

Aug 31Resolved

Revised Total Coliform Rule

Aug 31Resolved

Revised Total Coliform Rule

Aug 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Public Notice

Jul 7Active

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 3Active

Revised Total Coliform Rule

Jun 3Active

Lead and Copper Rule

Mar 30Resolved

Revised Total Coliform Rule

Jan 28Active

Revised Total Coliform Rule

Jan 28Active

E. COLI

Jan 2Active

E. COLI

Jan 2Active

2022(91)

Lead and Copper Rule

Dec 29Resolved

1,2,4-Trichlorobenzene

Sep 30Resolved

1,2-Dichloropropane

Sep 30Resolved

Styrene

Sep 30Resolved

Styrene

Sep 30Resolved

1,1,1-Trichloroethane

Sep 30Resolved

1,1,1-Trichloroethane

Sep 30Resolved

1,1,1-Trichloroethane

Sep 30Resolved

1,1,1-Trichloroethane

Sep 30Resolved

Benzene

Sep 30Resolved

cis-1,2-Dichloroethylene

Sep 30Resolved

Carbon tetrachloride

Sep 30Resolved

Carbon tetrachloride

Sep 30Resolved

Carbon tetrachloride

Sep 30Resolved

Carbon tetrachloride

Sep 30Resolved

Tetrachloroethylene

Sep 30Resolved

Tetrachloroethylene

Sep 30Resolved

Tetrachloroethylene

Sep 30Resolved

Tetrachloroethylene

Sep 30Resolved

cis-1,2-Dichloroethylene

Sep 30Resolved

cis-1,2-Dichloroethylene

Sep 30Resolved

Trichloroethylene

Sep 30Resolved

Trichloroethylene

Sep 30Resolved

Trichloroethylene

Sep 30Resolved

Styrene

Sep 30Resolved

DICHLOROMETHANE

Sep 30Resolved

DICHLOROMETHANE

Sep 30Resolved

DICHLOROMETHANE

Sep 30Resolved

o-Dichlorobenzene

Sep 30Resolved

o-Dichlorobenzene

Sep 30Resolved

o-Dichlorobenzene

Sep 30Resolved

o-Dichlorobenzene

Sep 30Resolved

p-Dichlorobenzene

Sep 30Resolved

p-Dichlorobenzene

Sep 30Resolved

p-Dichlorobenzene

Sep 30Resolved

p-Dichlorobenzene

Sep 30Resolved

1,1-Dichloroethylene

Sep 30Resolved

1,1-Dichloroethylene

Sep 30Resolved

1,1-Dichloroethylene

Sep 30Resolved

1,1-Dichloroethylene

Sep 30Resolved

1,2-Dichloroethane

Sep 30Resolved

1,2-Dichloroethane

Sep 30Resolved

1,2-Dichloroethane

Sep 30Resolved

1,2-Dichloroethane

Sep 30Resolved

1,1,2-Trichloroethane

Sep 30Resolved

1,1,2-Trichloroethane

Sep 30Resolved

1,1,2-Trichloroethane

Sep 30Resolved

1,1,2-Trichloroethane

Sep 30Resolved

Toluene

Sep 30Resolved

Toluene

Sep 30Resolved

Toluene

Sep 30Resolved

Toluene

Sep 30Resolved

Ethylbenzene

Sep 30Resolved

Ethylbenzene

Sep 30Resolved

Ethylbenzene

Sep 30Resolved

Ethylbenzene

Sep 30Resolved

1,2,4-Trichlorobenzene

Sep 30Resolved

Styrene

Sep 30Resolved

1,2,4-Trichlorobenzene

Sep 30Resolved

1,2,4-Trichlorobenzene

Sep 30Resolved

Trichloroethylene

Sep 30Resolved

1,2-Dichloropropane

Sep 30Resolved

CHLOROBENZENE

Sep 30Resolved

CHLOROBENZENE

Sep 30Resolved

CHLOROBENZENE

Sep 30Resolved

CHLOROBENZENE

Sep 30Resolved

Benzene

Sep 30Resolved

Benzene

Sep 30Resolved

cis-1,2-Dichloroethylene

Sep 30Resolved

Benzene

Sep 30Resolved

trans-1,2-Dichloroethylene

Sep 30Resolved

trans-1,2-Dichloroethylene

Sep 30Resolved

trans-1,2-Dichloroethylene

Sep 30Resolved

trans-1,2-Dichloroethylene

Sep 30Resolved

Vinyl chloride

Sep 30Resolved

Vinyl chloride

Sep 30Resolved

Vinyl chloride

Sep 30Resolved

Vinyl chloride

Sep 30Resolved

1,2-Dichloropropane

Sep 30Resolved

1,2-Dichloropropane

Sep 30Resolved

DICHLOROMETHANE

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Lead and Copper Rule

Sep 28Resolved

Lead and Copper Rule

Sep 28Resolved

Lead and Copper Rule

Mar 31Resolved

Lead and Copper Rule

Mar 31Resolved

Public Notice

Mar 16Resolved

Public Notice

Mar 16Resolved

How Does This Compare?

GUILFORD (06437) has 158 recorded violations, including 7 health-based. 14 remain unresolved. Consider testing your tap water independently for added peace of mind.

Recommended Water Filters

Based on the contaminants detected in your area, these filter types may help improve your water quality.

Reverse Osmosis System

Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.

Targets:Lead, Copper, Arsenic, Mercury, Cadmium

Look for:NSF/ANSI 58 certified

NSF Certified Products → EPA Safe Drinking Water Guide →

UV Water Purifier

Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.

Targets:E. coli, Coliform, Giardia, Cryptosporidium

Look for:NSF/ANSI 55 (Class A) certified

NSF Certified Products → EPA Safe Drinking Water Guide →

Always look for filters certified by NSF International for the specific contaminants you want to remove.

Water Quality in GUILFORD, CT (06437)

What does this mean?

Violations Detail (158 total)

Lead & Copper Levels

Violation Timeline

2025(11)

2024(46)

2023(3)

2022(91)

2021(7)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

UV Water Purifier

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