City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#4465
Castleton
County, VT
91 A
#4466 Clackamas
County, OR
91 A
#4467 Clarksville
County, AR
91 A
#4468 Clatskanie
County, OR
91 A
#4469 Cleveland
County, AL
91 A
#4470 Cloverdale
County, CA
91 A
#4471 Clovis
County, NM
91 A
#4472 Compton
County, CA
91 A
#4473 Conetoe
County, NC
91 A
#4474 Convent Station
County, NJ
91 A
#4475 Convoy
County, OH
91 A
#4476 Coupeville
County, WA
91 A
#4477 Crosby
County, TX
91 A
#4478 Cusseta
County, GA
91 A
#4479 Dallas
County, TX
91 A
#4480 Dallas
County, OR
91 A
#4481 Dalton
County, OH
91 A
#4482 Deforest
County, WI
91 A
#4483 Dixon
County, KY
91 A
#4484 Dowagiac
County, MI
91 A
#4485 Dunlap
County, IA
91 A
#4486 Eastover
County, NC
91 A
#4487 Eatonville
County, WA
91 A
#4488 Elizabethtown
County, PA
91 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.