City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#361
Firestone
County, CO
100 A
#362 Fitzgerald
County, GA
100 A
#363 Flora
County, IN
100 A
#364 Florala
County, AL
100 A
#365 Florence
County, WI
100 A
#366 Flowery Branch
County, GA
100 A
#367 Foley
County, AL
100 A
#368 Folsom
County, CA
100 A
#369 Forrest
County, IL
100 A
#370 Fort Benton
County, MT
100 A
#371 Fort Calhoun
County, NE
100 A
#372 Fort Campbell
County, KY
100 A
#373 Fort Harrison
County, MT
100 A
#374 Fort Hood
County, TX
100 A
#375 Fort Leavenworth
County, KS
100 A
#376 Fort Loramie
County, OH
100 A
#377 Fort Mccoy
County, WI
100 A
#378 Fort Recovery
County, OH
100 A
#379 Fort Riley
County, KS
100 A
#380 Fort Woth
County, TX
100 A
#381 Foster City
County, CA
100 A
#382 Fostoria
County, OH
100 A
#383 Fountain Valley
County, CA
100 A
#384 Fowler
County, MI
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.