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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#97
Lynnwood
County, WA
98 A
#98
Malaga
County, WA
98 A
#99
Maple Falls
County, WA
98 A
#100
Mccleary
County, WA
98 A
#101
Milton
County, WA
98 A
#102
Omak
County, WA
98 A
#103
Onalaska
County, WA
98 A
#104
Oroville
County, WA
98 A
#105
Orting
County, WA
98 A
#106
Port Ludlow
County, WA
98 A
#107
Raymond
County, WA
98 A
#108
Redmond
County, WA
98 A
#109
Shoreline
County, WA
98 A
#110
Spokane
County, WA
98 A
#111
Stevenson
County, WA
98 A
#112
Tekoa
County, WA
98 A
#113
Tonasket
County, WA
98 A
#114
Tumwater
County, WA
98 A
#115
Union Gap
County, WA
98 A
#116
Warden
County, WA
98 A
#117
West Richland
County, WA
98 A
#118
Allyn
County, WA
97 A
#119
Bow
County, WA
97 A
#120
Castle Rock
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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