WaterQ

City Water Quality Rankings in Washington

257 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 → Blaine, WA vs Bridgeport, WA Compare → Burien, WA vs Clarkston, WA Compare →

Trending Cities

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#145
Chattaroy
County, WA
96 A
#146
Enumclaw
County, WA
96 A
#147
Ephrata
County, WA
96 A
#148
Fairchild Afb
County, WA
96 A
#149
Fall City
County, WA
96 A
#150
Fox Island
County, WA
96 A
#151
George
County, WA
96 A
#152
Grandview
County, WA
96 A
#153
Harrah
County, WA
96 A
#154
Lakewood
County, WA
96 A
#155
Long Beach
County, WA
96 A
#156
Manchester
County, WA
96 A
#157
Mead
County, WA
96 A
#158
Mercer Island
County, WA
96 A
#159
Oak Harbor
County, WA
96 A
#160
Okanogan
County, WA
96 A
#161
Port Angeles
County, WA
96 A
#162
Port Orchard
County, WA
96 A
#163
Pullman
County, WA
96 A
#164
Quincy
County, WA
96 A
#165
Sequim
County, WA
96 A
#166
Spokane Valley
County, WA
96 A
#167
Sultan
County, WA
96 A
#168
Vancouver
County, WA
96 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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