City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10201
Hudson
County, FL
41 F
#10202 Kansas
County, OK
41 F
#10203 Lake Butler
County, FL
41 F
#10204 Lawrence
County, MI
41 F
#10205 Lexington
County, OK
41 F
#10206 Lockport
County, IL
41 F
#10207 Melrose
County, NM
41 F
#10208 Mill Creek
County, WV
41 F
#10209 Mooreland
County, OK
41 F
#10210 Moose Lake
County, MN
41 F
#10211 Morni
County, UT
41 F
#10212 North Caldwell
County, NJ
41 F
#10213 Odem
County, TX
41 F
#10214 Owensboro
County, KY
41 F
#10215 Pontiac
County, IL
41 F
#10216 Poynor
County, TX
41 F
#10217 St. Leo
County, FL
41 F
#10218 Towanda
County, PA
41 F
#10219 Brookfield
County, IL
40 F
#10220 Campbellsville
County, KY
40 F
#10221 Ceredo
County, WV
40 F
#10222 Chino Hills
County, CA
40 F
#10223 Combes
County, TX
40 F
#10224 Cross City
County, FL
40 F
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.