Water Quality in Friday Harbor, WA (98250)

EPA violation data for public water systems serving ZIP code 98250.

209

Total Violations

Health-Based

164

Monitoring / Reporting

209

Resolved

What does this mean?

209 of 209 violations have been resolved. 45 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 164 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: 66 Population served: 8,885

Violations Detail (209 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
TTHM	Health-Based	N/A	109.93	Jun 30, 2025	Resolved	N/A
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
CHLOROBENZENE	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Cardiovascular system or reproductive problems
Methoxychlor	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
o-Dichlorobenzene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Vinyl chloride	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Increased risk of cancer
Carbon tetrachloride	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Liver problems; increased risk of cancer
Tetrachloroethylene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Liver problems; increased risk of cancer
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
1,1-Dichloroethylene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
1,2-Dichloroethane	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
1,1,2-Trichloroethane	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Toluene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Ethylbenzene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Styrene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Trichloroethylene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Liver problems; increased risk of cancer
DICHLOROMETHANE	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
1,2-Dichloropropane	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Benzene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Anemia; decrease in blood platelets; increased risk of cancer
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
DICHLOROMETHANE	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Trichloroethylene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Liver problems; increased risk of cancer
1,1,2-Trichloroethane	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
1,2-Dichloroethane	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Styrene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
CHLOROBENZENE	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Vinyl chloride	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Increased risk of cancer
Endrin	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Tetrachloroethylene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Liver problems; increased risk of cancer
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Carbon tetrachloride	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Liver problems; increased risk of cancer
Toluene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
1,2-Dichloropropane	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
1,1-Dichloroethylene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
o-Dichlorobenzene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Cardiovascular system or reproductive problems
Dalapon	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Benzene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Anemia; decrease in blood platelets; increased risk of cancer
Methoxychlor	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
TTHM	Health-Based	N/A	96.37	Jun 30, 2025	Resolved	N/A
Ethylbenzene	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
TTHM	Health-Based	N/A	107.65	Mar 31, 2025	Resolved	N/A
1,2-Dichloropropane	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Benzene	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Anemia; decrease in blood platelets; increased risk of cancer
Tetrachloroethylene	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Liver problems; increased risk of cancer
CHLOROBENZENE	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
1,1,2-Trichloroethane	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Vinyl chloride	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Increased risk of cancer
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
o-Dichlorobenzene	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Styrene	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Carbon tetrachloride	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Liver problems; increased risk of cancer
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
DICHLOROMETHANE	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Ethylbenzene	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
1,1-Dichloroethylene	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Toluene	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Trichloroethylene	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Liver problems; increased risk of cancer
1,2-Dichloroethane	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
TTHM	Health-Based	N/A	96.45	Mar 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2025	Resolved	N/A
TTHM	Health-Based	N/A	105.58	Dec 31, 2024	Resolved	N/A
TTHM	Health-Based	N/A	96.3	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Sep 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
TTHM	Health-Based	N/A	95.1	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Arsenic	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
TTHM	Health-Based	N/A	86.63	Mar 31, 2024	Resolved	N/A
TTHM	Health-Based	N/A	99.45	Mar 31, 2024	Resolved	N/A
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Styrene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,2-Dichloroethane	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Trichloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Liver problems; increased risk of cancer
1,1,2-Trichloroethane	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Vinyl chloride	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Increased risk of cancer
Carbon tetrachloride	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Liver problems; increased risk of cancer
Tetrachloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Liver problems; increased risk of cancer
Benzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Anemia; decrease in blood platelets; increased risk of cancer
Arsenic	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
o-Dichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
CHLOROBENZENE	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
DICHLOROMETHANE	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,1-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,2-Dichloropropane	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Toluene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Ethylbenzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	82.4	Sep 30, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
TTHM	Health-Based	N/A	83.1	Jun 30, 2023	Resolved	N/A
Arsenic	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	104.6	Mar 31, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
TTHM	Health-Based	N/A	101.8	Dec 31, 2022	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Arsenic	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
TTHM	Health-Based	N/A	117.6	Sep 30, 2022	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Arsenic	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Aug 31, 2022	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Aug 31, 2022	Resolved	N/A
TTHM	Health-Based	N/A	107.6	Jun 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2022	Resolved	N/A
TTHM	Health-Based	N/A	87.8	Mar 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	63.7	Mar 31, 2022	Resolved	N/A
TTHM	Health-Based	N/A	133.4	Mar 31, 2022	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
TTHM	Health-Based	N/A	133.4	Mar 31, 2022	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	63.7	Mar 31, 2022	Resolved	N/A
TTHM	Health-Based	N/A	87.8	Dec 31, 2021	Resolved	N/A
Nitrate	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Total Haloacetic Acids (HAA5)	Health-Based	N/A	63.7	Dec 31, 2021	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	63.7	Dec 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	133.4	Dec 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	133.4	Dec 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	99.7	Sep 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	146.8	Sep 30, 2021	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	88.5	Sep 30, 2021	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	88.5	Sep 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	146.8	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	110	Jun 30, 2021	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	88.5	Jun 30, 2021	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	88.5	Jun 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	146.8	Jun 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	146.8	Jun 30, 2021	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	112.8	Mar 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	100.7	Mar 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	100.7	Mar 31, 2021	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	63.1	Mar 31, 2021	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	63.1	Mar 31, 2021	Resolved	N/A

Lead & Copper Levels

Violation Timeline

2025(110)

Consumer Confidence Rule

Jun 30Resolved

TTHM

Jun 30Resolved

trans-1,2-Dichloroethylene

Jun 30Resolved

CHLOROBENZENE

Jun 30Resolved

cis-1,2-Dichloroethylene

Jun 30Resolved

Di(2-ethylhexyl) adipate

Jun 30Resolved

Pentachlorophenol

Jun 30Resolved

Toxaphene

Jun 30Resolved

Dinoseb

Jun 30Resolved

Dalapon

Jun 30Resolved

Heptachlor

Jun 30Resolved

Endrin

Jun 30Resolved

Di(2-ethylhexyl) phthalate

Jun 30Resolved

Benzo(a)pyrene

Jun 30Resolved

Hexachlorocyclopentadiene

Jun 30Resolved

LASSO

Jun 30Resolved

Atrazine

Jun 30Resolved

Methoxychlor

Jun 30Resolved

o-Dichlorobenzene

Jun 30Resolved

p-Dichlorobenzene

Jun 30Resolved

Picloram

Jun 30Resolved

Vinyl chloride

Jun 30Resolved

Carbon tetrachloride

Jun 30Resolved

Tetrachloroethylene

Jun 30Resolved

1,2,4-Trichlorobenzene

Jun 30Resolved

1,1-Dichloroethylene

Jun 30Resolved

1,2-Dichloroethane

Jun 30Resolved

1,1,2-Trichloroethane

Jun 30Resolved

Toluene

Jun 30Resolved

Ethylbenzene

Jun 30Resolved

Styrene

Jun 30Resolved

HEXACHLOROBENZENE

Jun 30Resolved

BHC-GAMMA

Jun 30Resolved

2,4,5-TP

Jun 30Resolved

Heptachlor epoxide

Jun 30Resolved

Trichloroethylene

Jun 30Resolved

DICHLOROMETHANE

Jun 30Resolved

1,2-Dichloropropane

Jun 30Resolved

Benzene

Jun 30Resolved

1,1,1-Trichloroethane

Jun 30Resolved

Simazine

Jun 30Resolved

Chlordane

Jun 30Resolved

p-Dichlorobenzene

Jun 30Resolved

DICHLOROMETHANE

Jun 30Resolved

Hexachlorocyclopentadiene

Jun 30Resolved

Trichloroethylene

Jun 30Resolved

1,1,2-Trichloroethane

Jun 30Resolved

BHC-GAMMA

Jun 30Resolved

TTHM

Jun 30Resolved

1,2-Dichloroethane

Jun 30Resolved

LASSO

Jun 30Resolved

Styrene

Jun 30Resolved

Toxaphene

Jun 30Resolved

Simazine

Jun 30Resolved

cis-1,2-Dichloroethylene

Jun 30Resolved

CHLOROBENZENE

Jun 30Resolved

HEXACHLOROBENZENE

Jun 30Resolved

Benzo(a)pyrene

Jun 30Resolved

Vinyl chloride

Jun 30Resolved

Endrin

Jun 30Resolved

1,2,4-Trichlorobenzene

Jun 30Resolved

Tetrachloroethylene

Jun 30Resolved

trans-1,2-Dichloroethylene

Jun 30Resolved

Carbon tetrachloride

Jun 30Resolved

Toluene

Jun 30Resolved

1,1,1-Trichloroethane

Jun 30Resolved

1,2-Dichloropropane

Jun 30Resolved

1,1-Dichloroethylene

Jun 30Resolved

o-Dichlorobenzene

Jun 30Resolved

Picloram

Jun 30Resolved

Di(2-ethylhexyl) phthalate

Jun 30Resolved

Atrazine

Jun 30Resolved

Dalapon

Jun 30Resolved

Heptachlor epoxide

Jun 30Resolved

Benzene

Jun 30Resolved

Methoxychlor

Jun 30Resolved

Chlordane

Jun 30Resolved

Heptachlor

Jun 30Resolved

Pentachlorophenol

Jun 30Resolved

Dinoseb

Jun 30Resolved

TTHM

Jun 30Resolved

Ethylbenzene

Jun 30Resolved

2,4,5-TP

Jun 30Resolved

Total Haloacetic Acids (HAA5)

Jun 30Resolved

Di(2-ethylhexyl) adipate

Jun 30Resolved

Revised Total Coliform Rule

May 31Resolved

Revised Total Coliform Rule

Apr 30Resolved

TTHM

Mar 31Resolved

1,2-Dichloropropane

Mar 31Resolved

Benzene

Mar 31Resolved

Tetrachloroethylene

Mar 31Resolved

CHLOROBENZENE

Mar 31Resolved

1,1,2-Trichloroethane

Mar 31Resolved

p-Dichlorobenzene

Mar 31Resolved

Vinyl chloride

Mar 31Resolved

1,2,4-Trichlorobenzene

Mar 31Resolved

o-Dichlorobenzene

Mar 31Resolved

Styrene

Mar 31Resolved

Carbon tetrachloride

Mar 31Resolved

cis-1,2-Dichloroethylene

Mar 31Resolved

trans-1,2-Dichloroethylene

Mar 31Resolved

DICHLOROMETHANE

Mar 31Resolved

1,1,1-Trichloroethane

Mar 31Resolved

Ethylbenzene

Mar 31Resolved

1,1-Dichloroethylene

Mar 31Resolved

Toluene

Mar 31Resolved

Trichloroethylene

Mar 31Resolved

1,2-Dichloroethane

Mar 31Resolved

TTHM

Mar 31Resolved

Revised Total Coliform Rule

Feb 28Resolved

2024(17)

TTHM

Dec 31Resolved

TTHM

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

TTHM

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Arsenic

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

TTHM

Mar 31Resolved

TTHM

Mar 31Resolved

How Does This Compare?

Friday Harbor (98250) has 209 recorded violations, including 45 health-based. All violations have been resolved, which is a positive sign for current water quality. 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 →

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

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 Friday Harbor, WA (98250)

What does this mean?

Violations Detail (209 total)

Lead & Copper Levels

Violation Timeline

2025(110)

2024(17)

2023(32)

2022(23)

2021(27)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

Activated Carbon Filter

UV Water Purifier

Nearby ZIP Codes

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