City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10729
Johnstown
County, PA
19 F
#10730 Lowville
County, NY
19 F
#10731 Paonia
County, CO
19 F
#10732 Trinity
County, TX
19 F
#10733 Vinita
County, OK
19 F
#10734 Warner
County, OK
19 F
#10735 Westborough
County, MA
19 F
#10736 Barrow
County, AK
18 F
#10737 Catlettsburg
County, KY
18 F
#10738 Galway
County, NY
18 F
#10739 Greenfield
County, IL
18 F
#10740 Gretna
County, VA
18 F
#10741 Mansfield
County, PA
18 F
#10742 Markham
County, IL
18 F
#10743 Mount Gilead
County, NC
18 F
#10744 Narragansett
County, RI
18 F
#10745 Newkirk
County, OK
18 F
#10746 Oil City
County, LA
18 F
#10747 Presidio
County, TX
18 F
#10748 San Carlos
County, AZ
18 F
#10749 Sayre
County, OK
18 F
#10750 Springtown
County, TX
18 F
#10751 Baxter Springs
County, KS
17 F
#10752 Chino Valley
County, AZ
17 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.