City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1441
Dayton
County, WA
98 A
#1442 Deadwood
County, SD
98 A
#1443 Dearborn
County, MI
98 A
#1444 Decatur
County, IN
98 A
#1445 Decatur
County, MI
98 A
#1446 Del Mar
County, CA
98 A
#1447 Delta
County, CO
98 A
#1448 Demopolis
County, AL
98 A
#1449 Dequeen
County, AR
98 A
#1450 Desert Hot Springs
County, CA
98 A
#1451 Desoto
County, TX
98 A
#1452 Detroit Lakes
County, MN
98 A
#1453 Devine
County, TX
98 A
#1454 Dodge Center
County, MN
98 A
#1455 Donald
County, OR
98 A
#1456 Donalds
County, SC
98 A
#1457 Dover-Foxcroft
County, ME
98 A
#1458 Drexel
County, NC
98 A
#1459 Dryden
County, MI
98 A
#1460 Dubberly
County, LA
98 A
#1461 Dubois
County, IN
98 A
#1462 Dundee
County, MI
98 A
#1463 Dupo
County, IL
98 A
#1464 Durand
County, MI
98 A
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.