City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#11521
Wallace
County, NC
0 F
#11522 Wallingford
County, CT
0 F
#11523 Walnut Cove
County, NC
0 F
#11524 Walnutport
County, PA
0 F
#11525 Walthourville
County, GA
0 F
#11526 War
County, WV
0 F
#11527 Warm Springs
County, OR
0 F
#11528 Warrneton
County, GA
0 F
#11529 Waterloo
County, IL
0 F
#11530 Watonga
County, OK
0 F
#11531 Waurika
County, OK
0 F
#11532 Wayne
County, WV
0 F
#11533 Weedville
County, PA
0 F
#11534 Welch
County, WV
0 F
#11535 Wellton
County, AZ
0 F
#11536 West Caldwell
County, NJ
0 F
#11537 West Kingston
County, RI
0 F
#11538 West Tawakoni
County, TX
0 F
#11539 Westerly
County, RI
0 F
#11540 Westport
County, IN
0 F
#11541 Wewoka
County, OK
0 F
#11542 Wharton
County, TX
0 F
#11543 White Cottage
County, OH
0 F
#11544 Whitehall
County, NY
0 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.