City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#6409
Dunlap
County, IL
84 B
#6410 Durant
County, MS
84 B
#6411 Duxbury
County, MA
84 B
#6412 East Carondelet
County, IL
84 B
#6413 East Newark
County, NJ
84 B
#6414 Edgartown
County, MA
84 B
#6415 Eldorado
County, TX
84 B
#6416 Eldridge
County, AL
84 B
#6417 Elizabethville
County, PA
84 B
#6418 Elkhart
County, KS
84 B
#6419 Emmetsburg
County, IA
84 B
#6420 Erie
County, KS
84 B
#6421 Eureka
County, MO
84 B
#6422 Evans City
County, PA
84 B
#6423 Fairfield
County, PA
84 B
#6424 Falkner
County, MS
84 B
#6425 Farmington Hills
County, MI
84 B
#6426 Fayette
County, MO
84 B
#6427 Fayetteville
County, NC
84 B
#6428 Folsom
County, LA
84 B
#6429 Fort Belvoir
County, VA
84 B
#6430 Fort Covington
County, NY
84 B
#6431 Fort Oglethorpe
County, GA
84 B
#6432 Fort Yates
County, ND
84 B
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.