City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#4441
Black Earth
County, WI
91 A
#4442 Bloomer
County, WI
91 A
#4443 Boaz
County, AL
91 A
#4444 Box Elder
County, MT
91 A
#4445 Boyceville
County, WI
91 A
#4446 Bozeman
County, MT
91 A
#4447 Brantley
County, AL
91 A
#4448 Braymer
County, MO
91 A
#4449 Bridgeport
County, WV
91 A
#4450 Brinkley
County, AR
91 A
#4451 Brookville
County, OH
91 A
#4452 Broseley
County, MO
91 A
#4453 Brownwood
County, TX
91 A
#4454 Buena Vista
County, CO
91 A
#4455 Burgin
County, KY
91 A
#4456 Burlington
County, NC
91 A
#4457 Butte
County, MT
91 A
#4458 Cambridge City
County, IN
91 A
#4459 Camden
County, AL
91 A
#4460 Camp Pendleton
County, CA
91 A
#4461 Canon City
County, CO
91 A
#4462 Caribou
County, ME
91 A
#4463 Carter Lake
County, IA
91 A
#4464 Cashmere
County, WA
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.