WaterQ

City Water Quality Rankings in Washington

259 cities ranked by drinking water quality.

All States AL AK AZ AR CA CO CT DE FL GA HI ID IL IN IA KS KY LA ME MD MA MI MN MS MO MT NE NV NH NJ NM NY NC ND OH OK OR PA RI SC SD TN TX UT VT VA WA WV WI WY

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

Fairbanks, AK Fresno, CA San Jose, CA Sacramento, CA San Francisco, CA Houston, TX Fargo, ND
#73
Packwood
County, WA
99 A
#74
Renton
County, WA
99 A
#75
Rochester
County, WA
99 A
#76
Rock Island
County, WA
99 A
#77
Sammamish
County, WA
99 A
#78
Tenino
County, WA
99 A
#79
Toledo
County, WA
99 A
#80
Walla Walla
County, WA
99 A
#81
Waterville
County, WA
99 A
#82
Adna
County, WA
98 A
#83
Black Diamond
County, WA
98 A
#84
Carlsborg
County, WA
98 A
#85
Castle Rock
County, WA
98 A
#86
Centralia
County, WA
98 A
#87
Davenport
County, WA
98 A
#88
Dayton
County, WA
98 A
#89
East Wenatchee
County, WA
98 A
#90
Ephrata
County, WA
98 A
#91
Everett
County, WA
98 A
#92
Everson
County, WA
98 A
#93
Falls City
County, WA
98 A
#94
Federal Way
County, WA
98 A
#95
Fife
County, WA
98 A
#96
Granite Falls
County, WA
98 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.

Explore More Water Quality Data

State Rankings National Rankings Compare Cities All Water Systems