City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10537
Fort Ashby
County, WV
39 F
#10538 Galway
County, NY
39 F
#10539 Inola
County, OK
39 F
#10540 Jonesboro
County, LA
39 F
#10541 Kemp
County, TX
39 F
#10542 Kings Mountain
County, NC
39 F
#10543 Kingston
County, OH
39 F
#10544 Largo
County, FL
39 F
#10545 Montville
County, NJ
39 F
#10546 Parkland
County, FL
39 F
#10547 Rio Vista
County, TX
39 F
#10548 Seguin
County, TX
39 F
#10549 Sophia
County, WV
39 F
#10550 Thoreau
County, NM
39 F
#10551 Wailuku
County, HI
39 F
#10552 Wellington
County, NV
39 F
#10553 Wendover
County, UT
39 F
#10554 Woodland Park
County, NJ
39 F
#10555 Amite
County, LA
38 F
#10556 Barrington
County, IL
38 F
#10557 Bicknell
County, IN
38 F
#10558 Corozal
County, PR
38 F
#10559 Delcambre
County, LA
38 F
#10560 Flagstaff
County, AZ
38 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.