City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9361
Aberdeen
County, SD
63 C
#9362 Arnaudville
County, LA
63 C
#9363 Bastrop
County, TX
63 C
#9364 Black Mountain
County, NC
63 C
#9365 Breckenridge
County, CO
63 C
#9366 Bridgewater
County, MA
63 C
#9367 Butler
County, AL
63 C
#9368 Casey
County, IL
63 C
#9369 Country Club Hills
County, IL
63 C
#9370 Crestwood
County, IL
63 C
#9371 Decatur
County, MS
63 C
#9372 Dekalb
County, IL
63 C
#9373 East Palatka
County, FL
63 C
#9374 Edwardsville
County, IL
63 C
#9375 Frazeysburg
County, OH
63 C
#9376 Ft. Duchesne
County, UT
63 C
#9377 Gainesboro
County, TN
63 C
#9378 Gansevoort
County, NY
63 C
#9379 Georgetown
County, IL
63 C
#9380 Glouster
County, OH
63 C
#9381 Gold Beach
County, OR
63 C
#9382 Grapeland
County, TX
63 C
#9383 Harvey
County, IL
63 C
#9384 Hazel Crest
County, IL
63 C
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.