City Water Quality Rankings in Washington
259 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#193
Pateros
County, WA
95 A
#194 Puyallup
County, WA
95 A
#195 Shelton
County, WA
95 A
#196 Wapato
County, WA
95 A
#197 Bremerton
County, WA
94 A
#198 Camas
County, WA
94 A
#199 Darrington
County, WA
94 A
#200 Forks
County, WA
94 A
#201 Freeland
County, WA
94 A
#202 Friday Harbor
County, WA
94 A
#203 Grand Coulee
County, WA
94 A
#204 Grandview
County, WA
94 A
#205 Mount Vernon
County, WA
94 A
#206 Winlock
County, WA
94 A
#207 Winthrop
County, WA
94 A
#208 Bellingham
County, WA
93 A
#209 Brewster
County, WA
93 A
#210 Buckley
County, WA
93 A
#211 Carson
County, WA
93 A
#212 Graham
County, WA
93 A
#213 Kettle Falls
County, WA
93 A
#214 Leavenworth
County, WA
93 A
#215 Snoqualmie Pass
County, WA
93 A
#216 Des Moines
County, WA
92 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.