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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#121
Shoreline
County, WA
98 A
#122
South Bend
County, WA
98 A
#123
Spokane
County, WA
98 A
#124
Spokane Valley
County, WA
98 A
#125
Stevenson
County, WA
98 A
#126
Sumner
County, WA
98 A
#127
Sunnyside
County, WA
98 A
#128
Tekoa
County, WA
98 A
#129
Tonasket
County, WA
98 A
#130
Tumwater
County, WA
98 A
#131
Union Gap
County, WA
98 A
#132
Vancouver
County, WA
98 A
#133
Warden
County, WA
98 A
#134
West Richland
County, WA
98 A
#135
Bow
County, WA
97 A
#136
Chehalis
County, WA
97 A
#137
Edmonds
County, WA
97 A
#138
Glacier
County, WA
97 A
#139
Hoquiam
County, WA
97 A
#140
Pomeroy
County, WA
97 A
#141
Poulsbo
County, WA
97 A
#142
Quincy
County, WA
97 A
#143
Rainier
County, WA
97 A
#144
Royal City
County, WA
97 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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