City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#337
Erie
County, CO
100 A
#338 Escondido
County, CA
100 A
#339 Esko
County, MN
100 A
#340 Essexville
County, MI
100 A
#341 Eudora
County, AR
100 A
#342 Euless
County, TX
100 A
#343 Eureka
County, CA
100 A
#344 Evanston
County, IL
100 A
#345 Evanston
County, WY
100 A
#346 Exeter
County, NH
100 A
#347 Fair Grove
County, MO
100 A
#348 Fair Oaks
County, CA
100 A
#349 Fairview
County, TX
100 A
#350 Falls City
County, NE
100 A
#351 Farmington
County, MI
100 A
#352 Farmington
County, PA
100 A
#353 Fayette
County, AL
100 A
#354 Federal Heights
County, CO
100 A
#355 Federalsburg
County, MD
100 A
#356 Felton
County, CA
100 A
#357 Ferndale
County, MI
100 A
#358 Fessenden
County, ND
100 A
#359 Fillmore
County, MO
100 A
#360 Fircrest
County, WA
100 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.