Water Quality in Coupeville, WA (98239)

EPA violation data for public water systems serving ZIP code 98239.

613

Total Violations

87

Health-Based

526

Monitoring / Reporting

596

Resolved

What does this mean?

596 of 613 violations have been resolved. 87 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 526 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: 147 Population served: 31,284

Violations Detail (613 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Revised Total Coliform RuleMonitoringN/AN/AJul 31, 2025ResolvedN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
NitrateMonitoringN/AN/AJun 30, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ActiveN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ActiveN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A

Lead & Copper Levels

Violation Timeline

2025(131)

Revised Total Coliform Rule

3A

Jul 31Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Nitrate

03

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Active

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Active

Consumer Confidence Rule

71

Jun 30Resolved

Arsenic

03

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Arsenic

03

Jun 30Resolved

Arsenic

03

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Active

Consumer Confidence Rule

71

Jun 30Active

Revised Total Coliform Rule

3A

Jun 30Resolved

TTHM

27

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Total Haloacetic Acids (HAA5)

27

Jun 30Resolved

TTHM

02

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Total Haloacetic Acids (HAA5)

02

Jun 30Resolved

Arsenic

03

Jun 30Resolved

Arsenic

01

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Total Haloacetic Acids (HAA5)

27

Jun 30Resolved

TTHM

27

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Arsenic

01

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Arsenic

03

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Nitrate

03

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Dinoseb

03

Jun 30Resolved

2,4,5-TP

03

Jun 30Resolved

Dalapon

03

Jun 30Resolved

Picloram

03

Jun 30Resolved

Pentachlorophenol

03

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Benzo(a)pyrene

03

Jun 30Resolved

Methoxychlor

03

Jun 30Resolved

Atrazine

03

Jun 30Resolved

Dalapon

03

Jun 30Resolved

Dinoseb

03

Jun 30Resolved

Toxaphene

03

Jun 30Resolved

Picloram

03

Jun 30Resolved

Heptachlor

03

Jun 30Resolved

Heptachlor epoxide

03

Jun 30Resolved

BHC-GAMMA

03

Jun 30Resolved

Chlordane

03

Jun 30Resolved

Di(2-ethylhexyl) adipate

03

Jun 30Resolved

LASSO

03

Jun 30Resolved

2,4,5-TP

03

Jun 30Resolved

Endrin

03

Jun 30Resolved

Pentachlorophenol

03

Jun 30Resolved

HEXACHLOROBENZENE

03

Jun 30Resolved

Hexachlorocyclopentadiene

03

Jun 30Resolved

Di(2-ethylhexyl) phthalate

03

Jun 30Resolved

Simazine

03

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

1,2-Dichloroethane

03

Jun 30Resolved

Styrene

03

Jun 30Resolved

1,1,1-Trichloroethane

03

Jun 30Resolved

1,2-Dichloropropane

03

Jun 30Resolved

p-Dichlorobenzene

03

Jun 30Resolved

Toluene

03

Jun 30Resolved

trans-1,2-Dichloroethylene

03

Jun 30Resolved

Vinyl chloride

03

Jun 30Resolved

Carbon tetrachloride

03

Jun 30Resolved

Trichloroethylene

03

Jun 30Resolved

Tetrachloroethylene

03

Jun 30Resolved

Benzene

03

Jun 30Resolved

1,2,4-Trichlorobenzene

03

Jun 30Resolved

cis-1,2-Dichloroethylene

03

Jun 30Resolved

DICHLOROMETHANE

03

Jun 30Resolved

o-Dichlorobenzene

03

Jun 30Resolved

1,1-Dichloroethylene

03

Jun 30Resolved

CHLOROBENZENE

03

Jun 30Resolved

1,1,2-Trichloroethane

03

Jun 30Resolved

Ethylbenzene

03

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Active

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Nitrate

03

Mar 31Resolved

TTHM

02

Mar 31Resolved

Arsenic

03

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

TTHM

02

Mar 31Resolved

Total Haloacetic Acids (HAA5)

02

Mar 31Resolved

Arsenic

03

Mar 31Resolved

Arsenic

01

Mar 31Resolved

Arsenic

01

Mar 31Resolved

TTHM

27

Mar 31Resolved

Total Haloacetic Acids (HAA5)

27

Mar 31Resolved

Revised Total Coliform Rule

3A

Feb 28Resolved

Revised Total Coliform Rule

3A

Feb 28Resolved

Revised Total Coliform Rule

3A

Feb 28Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

2024(124)

Nitrate

03

Dec 31Resolved

Revised Total Coliform Rule

3A

Dec 31Resolved

Revised Total Coliform Rule

3A

Dec 31Resolved

Arsenic

03

Dec 31Resolved

Arsenic

01

Dec 31Resolved

Total Haloacetic Acids (HAA5)

27

Dec 31Resolved

TTHM

27

Dec 31Resolved

Revised Total Coliform Rule

3A

Dec 31Resolved

Total Haloacetic Acids (HAA5)

02

Dec 31Resolved

TTHM

02

Dec 31Resolved

Arsenic

03

Dec 31Resolved

Arsenic

01

Dec 31Resolved

Revised Total Coliform Rule

3A

Dec 31Resolved

Arsenic

01

Dec 31Resolved

Nitrate

03

Dec 31Resolved

TTHM

27

Dec 31Resolved

Total Haloacetic Acids (HAA5)

27

Dec 31Resolved

Vinyl chloride

03

Dec 31Resolved

CHLOROBENZENE

03

Dec 31Resolved

1,1,1-Trichloroethane

03

Dec 31Resolved

Benzene

03

Dec 31Resolved

Picloram

03

Dec 31Resolved

Di(2-ethylhexyl) adipate

03

Dec 31Resolved

trans-1,2-Dichloroethylene

03

Dec 31Resolved

1,2-Dichloropropane

03

Dec 31Resolved

Toluene

03

Dec 31Resolved

Benzo(a)pyrene

03

Dec 31Resolved

DICHLOROMETHANE

03

Dec 31Resolved

Tetrachloroethylene

03

Dec 31Resolved

Atrazine

03

Dec 31Resolved

Carbon tetrachloride

03

Dec 31Resolved

Trichloroethylene

03

Dec 31Resolved

Dalapon

03

Dec 31Resolved

Dinoseb

03

Dec 31Resolved

2,4,5-TP

03

Dec 31Resolved

Pentachlorophenol

03

Dec 31Resolved

BHC-GAMMA

03

Dec 31Resolved

Methoxychlor

03

Dec 31Resolved

Toxaphene

03

Dec 31Resolved

Simazine

03

Dec 31Resolved

Di(2-ethylhexyl) phthalate

03

Dec 31Resolved

Hexachlorocyclopentadiene

03

Dec 31Resolved

LASSO

03

Dec 31Resolved

Heptachlor

03

Dec 31Resolved

Heptachlor epoxide

03

Dec 31Resolved

HEXACHLOROBENZENE

03

Dec 31Resolved

Chlordane

03

Dec 31Resolved

1,2,4-Trichlorobenzene

03

Dec 31Resolved

cis-1,2-Dichloroethylene

03

Dec 31Resolved

o-Dichlorobenzene

03

Dec 31Resolved

p-Dichlorobenzene

03

Dec 31Resolved

1,1-Dichloroethylene

03

Dec 31Resolved

1,2-Dichloroethane

03

Dec 31Resolved

1,1,2-Trichloroethane

03

Dec 31Resolved

Ethylbenzene

03

Dec 31Resolved

Styrene

03

Dec 31Resolved

Endrin

03

Dec 31Resolved

Revised Total Coliform Rule

3A

Dec 31Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Arsenic

01

Sep 30Resolved

Total Haloacetic Acids (HAA5)

02

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Arsenic

01

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Total Haloacetic Acids (HAA5)

02

Sep 30Resolved

TTHM

02

Sep 30Resolved

Arsenic

03

Sep 30Resolved

Arsenic

01

Sep 30Resolved

Total Haloacetic Acids (HAA5)

27

Sep 30Resolved

TTHM

27

Sep 30Resolved

Arsenic

01

Sep 30Resolved

Revised Total Coliform Rule

3A

Aug 31Resolved

Revised Total Coliform Rule

3A

Aug 31Resolved

Revised Total Coliform Rule

3A

Aug 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Arsenic

01

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

TTHM

02

Jun 30Resolved

Total Haloacetic Acids (HAA5)

02

Jun 30Resolved

Arsenic

01

Jun 30Resolved

Arsenic

03

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Arsenic

01

Jun 30Resolved

TTHM

02

Jun 30Resolved

Total Haloacetic Acids (HAA5)

02

Jun 30Resolved

Arsenic

03

Jun 30Resolved

Arsenic

01

Jun 30Resolved

Arsenic

03

Jun 30Resolved

TTHM

02

Jun 30Resolved

Arsenic

01

Jun 30Resolved

Nitrate

03

Jun 30Resolved

Lead and Copper Rule

51

Jun 30Active

Arsenic

01

Jun 30Resolved

Arsenic

01

Mar 31Resolved

TTHM

02

Mar 31Resolved

Total Haloacetic Acids (HAA5)

27

Mar 31Resolved

TTHM

27

Mar 31Resolved

TTHM

02

Mar 31Resolved

Total Haloacetic Acids (HAA5)

02

Mar 31Resolved

Arsenic

01

Mar 31Resolved

Arsenic

01

Mar 31Resolved

TTHM

02

Mar 31Resolved

Total Haloacetic Acids (HAA5)

02

Mar 31Resolved

Arsenic

03

Mar 31Resolved

Arsenic

03

Mar 31Resolved

Arsenic

01

Mar 31Resolved

TTHM

27

Mar 31Resolved

Total Haloacetic Acids (HAA5)

27

Mar 31Resolved

TTHM

02

Mar 31Resolved

Arsenic

01

Mar 31Resolved

TTHM

02

Mar 31Resolved

Nitrate

03

Mar 31Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

How Does This Compare?

Coupeville (98239) has 613 recorded violations, including 87 health-based. 17 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

Activated Carbon Filter

Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.

Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor

Look for:NSF/ANSI 42 & 53 certified

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

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

Nearby ZIP Codes

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