City Water Quality Rankings in Washington
257 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#169
Washougal
County, WA
96 A
#170 Woodland
County, WA
96 A
#171 Yakima
County, WA
96 A
#172 Cle Elum
County, WA
95 A
#173 Ion
County, WA
95 A
#174 Kent
County, WA
95 A
#175 La Conner
County, WA
95 A
#176 Marysville
County, WA
95 A
#177 Morton
County, WA
95 A
#178 Mossyrock
County, WA
95 A
#179 Mt Vernon
County, WA
95 A
#180 Napavine
County, WA
95 A
#181 Pateros
County, WA
95 A
#182 Puyallup
County, WA
95 A
#183 Snohomish
County, WA
95 A
#184 Snoqualmie
County, WA
95 A
#185 Toppenish
County, WA
95 A
#186 Winthrop
County, WA
95 A
#187 Bremerton
County, WA
94 A
#188 Brewster
County, WA
94 A
#189 Buckley
County, WA
94 A
#190 Darrington
County, WA
94 A
#191 Eastsound
County, WA
94 A
#192 Edmonds
County, WA
94 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.