City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#4729
Crown Point
County, IN
90 A
#4730 Cushing
County, OK
90 A
#4731 Daleville
County, AL
90 A
#4732 Dallas Center
County, IA
90 A
#4733 Daly City
County, CA
90 A
#4734 Danbury
County, TX
90 A
#4735 Darlington
County, SC
90 A
#4736 Dauphin Island
County, AL
90 A
#4737 De Berry
County, TX
90 A
#4738 Delevan
County, NY
90 A
#4739 Denham Springs
County, LA
90 A
#4740 Dickinson
County, TX
90 A
#4741 Dillon
County, CO
90 A
#4742 Dixon
County, MO
90 A
#4743 Dolgeville
County, NY
90 A
#4744 Dora
County, AL
90 A
#4745 Douglas
County, AL
90 A
#4746 Downingtown
County, PA
90 A
#4747 Drumright
County, OK
90 A
#4748 Dundas
County, MN
90 A
#4749 Dyersville
County, IA
90 A
#4750 Dyess Afb
County, TX
90 A
#4751 East Syracuse
County, NY
90 A
#4752 Eatonton
County, GA
90 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.