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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#169
Mead
County, WA
96 A
#170
Mercer Island
County, WA
96 A
#171
Monroe
County, WA
96 A
#172
Oak Harbor
County, WA
96 A
#173
Ocean Park
County, WA
96 A
#174
Port Angeles
County, WA
96 A
#175
Port Orchard
County, WA
96 A
#176
Pullman
County, WA
96 A
#177
Sequim
County, WA
96 A
#178
Snohomish
County, WA
96 A
#179
Snoqualmie
County, WA
96 A
#180
Sultan
County, WA
96 A
#181
Toppenish
County, WA
96 A
#182
Washougal
County, WA
96 A
#183
Woodland
County, WA
96 A
#184
Cle Elum
County, WA
95 A
#185
Deer Park
County, WA
95 A
#186
Ion
County, WA
95 A
#187
Kent
County, WA
95 A
#188
La Conner
County, WA
95 A
#189
Marysville
County, WA
95 A
#190
Morton
County, WA
95 A
#191
Mossyrock
County, WA
95 A
#192
Napavine
County, WA
95 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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