City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9793
Chesterfield
County, MO
50 D
#9794 Claude
County, TX
50 D
#9795 Cocoa
County, FL
50 D
#9796 Cokato
County, MN
50 D
#9797 Colusa
County, CA
50 D
#9798 Concord
County, NH
50 D
#9799 Dalton
County, MA
50 D
#9800 Duchesne
County, UT
50 D
#9801 East Hanover Township
County, NJ
50 D
#9802 Eden
County, NC
50 D
#9803 Edgewater
County, FL
50 D
#9804 Friona
County, TX
50 D
#9805 Glenwood
County, IA
50 D
#9806 Grapeland
County, TX
50 D
#9807 Griswold
County, IA
50 D
#9808 Helper
County, UT
50 D
#9809 Hilmar
County, CA
50 D
#9810 Hilton Head
County, SC
50 D
#9811 Hopkinsville
County, KY
50 D
#9812 Illiopolis
County, IL
50 D
#9813 Jackman
County, ME
50 D
#9814 Jackson
County, NC
50 D
#9815 Juneau
County, WI
50 D
#9816 King Of Prussia
County, PA
50 D
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.