City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10105
Colusa
County, CA
50 D
#10106 Concord
County, NH
50 D
#10107 Dalton
County, MA
50 D
#10108 Danielsville
County, GA
50 D
#10109 Defiance
County, OH
50 D
#10110 Drew
County, MS
50 D
#10111 Durant
County, OK
50 D
#10112 Eden
County, NC
50 D
#10113 Edgewater
County, FL
50 D
#10114 Florida City
County, FL
50 D
#10115 Fort Pierce
County, FL
50 D
#10116 Freemont
County, NC
50 D
#10117 Glenwood
County, IA
50 D
#10118 Goldthwaite
County, TX
50 D
#10119 Hayden
County, CO
50 D
#10120 Helper
County, UT
50 D
#10121 Hilton Head
County, SC
50 D
#10122 Hogansville
County, GA
50 D
#10123 Hopkinsville
County, KY
50 D
#10124 Jourdanton
County, TX
50 D
#10125 Laguna
County, NM
50 D
#10126 London
County, KY
50 D
#10127 Louisburg
County, NC
50 D
#10128 Lynnville
County, IN
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.