City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10609
White Hall
County, IL
37 F
#10610 Buffalo
County, IL
36 F
#10611 Deltona
County, FL
36 F
#10612 Elgin
County, OK
36 F
#10613 Erie
County, IL
36 F
#10614 Fowler
County, CO
36 F
#10615 Hinsdale
County, MA
36 F
#10616 Jal
County, NM
36 F
#10617 Le Grand
County, CA
36 F
#10618 Lincoln Park
County, NJ
36 F
#10619 Lonaconing
County, MD
36 F
#10620 Medford
County, NJ
36 F
#10621 Miles City
County, MT
36 F
#10622 Monee
County, IL
36 F
#10623 Narragansett
County, RI
36 F
#10624 New Burnside
County, IL
36 F
#10625 North Lauderdale
County, FL
36 F
#10626 Polo
County, IL
36 F
#10627 Rosedale
County, MS
36 F
#10628 Saddle Brook
County, NJ
36 F
#10629 Saint Johns
County, AZ
36 F
#10630 Sheffield
County, AL
36 F
#10631 Sparta
County, NJ
36 F
#10632 St. Martinville
County, LA
36 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.