City Water Quality Rankings in Washington
259 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#217
Lynden
County, WA
92 A
#218 Manson
County, WA
92 A
#219 Pouslbo
County, WA
92 A
#220 Republic
County, WA
92 A
#221 Union
County, WA
92 A
#222 Wellpinit
County, WA
92 A
#223 Auburn
County, WA
91 A
#224 Cashmere
County, WA
91 A
#225 Coupeville
County, WA
91 A
#226 Eatonville
County, WA
91 A
#227 Longview
County, WA
91 A
#228 Olympia
County, WA
91 A
#229 Richland
County, WA
91 A
#230 Vashon
County, WA
91 A
#231 Port Townsend
County, WA
90 A
#232 Quinault
County, WA
90 A
#233 Spanaway
County, WA
90 A
#234 Stanwood
County, WA
90 A
#235 Wilkeson
County, WA
90 A
#236 Joyce
County, WA
89 B
#237 Marshall
County, WA
89 B
#238 Mattawa
County, WA
89 B
#239 Roslyn
County, WA
89 B
#240 Othello
County, WA
88 B
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.