WaterQ

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.

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