City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1177
Yosemite Np
County, CA
100 A
#1178 Yuba City
County, CA
100 A
#1179 Yutan
County, NE
100 A
#1180 Zeeland
County, MI
100 A
#1181 Aberdeen
County, WA
99 A
#1182 Airway
County, WA
99 A
#1183 Alamo
County, TN
99 A
#1184 Alpine
County, AL
99 A
#1185 Amenia
County, NY
99 A
#1186 Ansonia
County, OH
99 A
#1187 Ashtabula
County, OH
99 A
#1188 Atascadero
County, CA
99 A
#1189 Auburn
County, CA
99 A
#1190 Auburn
County, IN
99 A
#1191 Bingen
County, WA
99 A
#1192 Black River
County, NY
99 A
#1193 Blaine
County, WA
99 A
#1194 Bothell
County, WA
99 A
#1195 Cerro Gordo
County, IL
99 A
#1196 Chardon
County, OH
99 A
#1197 Chewelah
County, WA
99 A
#1198 Cincinnati
County, OH
99 A
#1199 Colfax
County, WA
99 A
#1200 Columbia Station
County, OH
99 A
Frequently Asked Questions
How are city water quality rankings calculated?
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 US cities directly?
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.