WaterQ

City Water Quality Rankings in Washington

259 cities ranked by drinking water quality.

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Popular city water quality comparisons

Anderson Island, WA vs Asotin, WA Compare → Bainbridge Island, WA vs Bellevue, WA Compare → Bridgeport, WA vs Burien, WA Compare → Cheney, WA vs Clarkston, WA Compare →

Trending Cities

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#49
Waverly
County, WA
100 A
#50
Wenatchee
County, WA
100 A
#51
Woodinville
County, WA
100 A
#52
Yelm
County, WA
100 A
#53
Aberdeen
County, WA
99 A
#54
Airway
County, WA
99 A
#55
Bingen
County, WA
99 A
#56
Blaine
County, WA
99 A
#57
Bothell
County, WA
99 A
#58
Chewelah
County, WA
99 A
#59
Colfax
County, WA
99 A
#60
Colville
County, WA
99 A
#61
Dupont
County, WA
99 A
#62
Electric City
County, WA
99 A
#63
Elma
County, WA
99 A
#64
Entiat
County, WA
99 A
#65
Ferndale
County, WA
99 A
#66
Goldendale
County, WA
99 A
#67
Granger
County, WA
99 A
#68
Joint Base Lewis-Mcchord
County, WA
99 A
#69
Langley
County, WA
99 A
#70
Montesano
County, WA
99 A
#71
Mountlake Terrace
County, WA
99 A
#72
North Bend
County, WA
99 A

Frequently Asked Questions

How are city water quality rankings calculated in Washington?

WaterQ city rankings are based on EPA SDWIS data across local public water systems, including contaminant detections, compliance violations, and recency-weighted score signals.

Can I compare two cities in Washington?

Yes. Use the city comparison links on this page or open the Compare tool to evaluate two cities side by side on score, grade, and water system coverage.

How often does WaterQ refresh city data?

City-level metrics refresh when new EPA data is processed. Check city pages for latest score and violation context.

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