City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9001
Auburn
County, MA
67 C
#9002 Bellingham
County, MA
67 C
#9003 Bellwood
County, IL
67 C
#9004 Bullard
County, TX
67 C
#9005 Chico
County, CA
67 C
#9006 Colchester
County, CT
67 C
#9007 Collinsville
County, MS
67 C
#9008 Crawfordsville
County, IN
67 C
#9009 Doerun
County, GA
67 C
#9010 East Longmeadow
County, MA
67 C
#9011 Edinburg
County, TX
67 C
#9012 Ellsworth
County, KS
67 C
#9013 Elton
County, LA
67 C
#9014 Farmington
County, NM
67 C
#9015 Fond Du Lac
County, WI
67 C
#9016 Foreman
County, AR
67 C
#9017 Frankfort
County, KY
67 C
#9018 Garrison
County, TX
67 C
#9019 Globe
County, AZ
67 C
#9020 Great Barrington
County, MA
67 C
#9021 Greenville
County, KY
67 C
#9022 Grovetown
County, GA
67 C
#9023 Hilliard
County, FL
67 C
#9024 Holliston
County, MA
67 C
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.