City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#289
Fillmore
County, MO
100 A
#290 Fircrest
County, WA
100 A
#291 Firestone
County, CO
100 A
#292 Fitzgerald
County, GA
100 A
#293 Flora
County, IN
100 A
#294 Florala
County, AL
100 A
#295 Flowery Branch
County, GA
100 A
#296 Folsom
County, CA
100 A
#297 Fort Calhoun
County, NE
100 A
#298 Fort Campbell
County, KY
100 A
#299 Fort Harrison
County, MT
100 A
#300 Fort Hood
County, TX
100 A
#301 Fort Hunter Liggett
County, CA
100 A
#302 Fort Leavenworth
County, KS
100 A
#303 Fort Loramie
County, OH
100 A
#304 Fort Recovery
County, OH
100 A
#305 Fort Riley
County, KS
100 A
#306 Foster City
County, CA
100 A
#307 Fostoria
County, OH
100 A
#308 Fountain Valley
County, CA
100 A
#309 Fowler
County, MI
100 A
#310 Frankenmuth
County, MI
100 A
#311 Frankford
County, DE
100 A
#312 Frankfort
County, OH
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.