City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10705
Walsenburg
County, CO
21 F
#10706 Westlake
County, LA
21 F
#10707 Arlington Heights
County, IL
20 F
#10708 Casa Grande
County, AZ
20 F
#10709 Dos Palos
County, CA
20 F
#10710 Grantville
County, GA
20 F
#10711 Highlands
County, NC
20 F
#10712 Ingleside
County, IL
20 F
#10713 Lynch
County, KY
20 F
#10714 Mont Belvieu
County, TX
20 F
#10715 Olive Hill
County, KY
20 F
#10716 Somerton
County, AZ
20 F
#10717 Warrensburg
County, NY
20 F
#10718 West Union
County, WV
20 F
#10719 Westfield
County, MA
20 F
#10720 Abbeville
County, AL
19 F
#10721 Birdseye
County, IN
19 F
#10722 Brooklyn
County, IN
19 F
#10723 Clinton
County, NJ
19 F
#10724 Groesbeck
County, TX
19 F
#10725 Hackett
County, AR
19 F
#10726 Hawthorne
County, NJ
19 F
#10727 Highland
County, IL
19 F
#10728 Howey In The Hills
County, FL
19 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.