City Water Quality Rankings in Washington
257 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#193
Forks
County, WA
94 A
#194 Grand Coulee
County, WA
94 A
#195 Richland
County, WA
94 A
#196 Shelton
County, WA
94 A
#197 Sunnyside
County, WA
94 A
#198 Winlock
County, WA
94 A
#199 Camas
County, WA
93 A
#200 Carson
County, WA
93 A
#201 Freeland
County, WA
93 A
#202 Graham
County, WA
93 A
#203 Kettle Falls
County, WA
93 A
#204 Lake Tapps
County, WA
93 A
#205 Manson
County, WA
93 A
#206 Snoqualmie Pass
County, WA
93 A
#207 Bellingham
County, WA
92 A
#208 Leavenworth
County, WA
92 A
#209 Lynden
County, WA
92 A
#210 Pouslbo
County, WA
92 A
#211 Union
County, WA
92 A
#212 White Salmon
County, WA
92 A
#213 Wilkeson
County, WA
92 A
#214 Eatonville
County, WA
91 A
#215 Friday Harbor
County, WA
91 A
#216 Longview
County, WA
91 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.