City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10273
Napoleon
County, OH
47 D
#10274 Richford
County, VT
47 D
#10275 San Jacinto
County, CA
47 D
#10276 Stanley
County, VA
47 D
#10277 Wauseon
County, OH
47 D
#10278 Albany
County, LA
46 D
#10279 Aledo
County, TX
46 D
#10280 Algonquin
County, IL
46 D
#10281 Amherst
County, MA
46 D
#10282 Angleton
County, TX
46 D
#10283 Ashford
County, WA
46 D
#10284 Beaver
County, UT
46 D
#10285 Berea
County, KY
46 D
#10286 Brownstown
County, PA
46 D
#10287 Byesville
County, OH
46 D
#10288 Carroll Valley
County, PA
46 D
#10289 Crockett
County, TX
46 D
#10290 Dwight
County, IL
46 D
#10291 East Brunswick Twp
County, NJ
46 D
#10292 Elkins
County, WV
46 D
#10293 Ellerbe
County, NC
46 D
#10294 Elsa
County, TX
46 D
#10295 Gamerco
County, NM
46 D
#10296 Genola
County, UT
46 D
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.