City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#7585
Creve Coeur
County, IL
78 B
#7586 Crittenden
County, KY
78 B
#7587 Cumby
County, TX
78 B
#7588 Cuyahoga Falls
County, OH
78 B
#7589 Dalzell
County, SC
78 B
#7590 Daytona Beach
County, FL
78 B
#7591 Delta
County, PA
78 B
#7592 Derby
County, VT
78 B
#7593 Dix
County, IL
78 B
#7594 Dodge
County, TX
78 B
#7595 Dry Ridge
County, KY
78 B
#7596 Dublin
County, PA
78 B
#7597 Dunsmuir
County, CA
78 B
#7598 Eagle
County, WI
78 B
#7599 East Fairfield
County, VT
78 B
#7600 Eaton Rapids
County, MI
78 B
#7601 El Dorado
County, KS
78 B
#7602 Elderton
County, PA
78 B
#7603 Elizabethton
County, TN
78 B
#7604 Elk City
County, OK
78 B
#7605 Elysian Fields
County, TX
78 B
#7606 Emmitsburg
County, MD
78 B
#7607 Enid
County, OK
78 B
#7608 Farmington
County, AR
78 B
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.