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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#121
Chehalis
County, WA
97 A
#122
Chewelah
County, WA
97 A
#123
Falls City
County, WA
97 A
#124
Glacier
County, WA
97 A
#125
Hoquiam
County, WA
97 A
#126
Lacey
County, WA
97 A
#127
Loon Lake
County, WA
97 A
#128
Newport
County, WA
97 A
#129
Pomeroy
County, WA
97 A
#130
Poulsbo
County, WA
97 A
#131
Rainier
County, WA
97 A
#132
Roy
County, WA
97 A
#133
Royal City
County, WA
97 A
#134
Selah
County, WA
97 A
#135
Silverdale
County, WA
97 A
#136
Sumner
County, WA
97 A
#137
Tacoma
County, WA
97 A
#138
Wapato
County, WA
97 A
#139
Zillah
County, WA
97 A
#140
Algona
County, WA
96 A
#141
Battle Ground
County, WA
96 A
#142
Belfair
County, WA
96 A
#143
Benton City
County, WA
96 A
#144
Birch Bay
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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