City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9361
Georgetown
County, TX
58 D
#9362 Gloster
County, MS
58 D
#9363 Grafton
County, WI
58 D
#9364 Greenup
County, KY
58 D
#9365 Hardwood Heights
County, IL
58 D
#9366 Haubstadt
County, IN
58 D
#9367 Henderson
County, KY
58 D
#9368 Henderson
County, TX
58 D
#9369 Hialeah
County, FL
58 D
#9370 Highland
County, UT
58 D
#9371 Holden
County, MA
58 D
#9372 Iraan
County, TX
58 D
#9373 Jenkinsville
County, SC
58 D
#9374 Kapalua
County, HI
58 D
#9375 Lake Forest
County, IL
58 D
#9376 Latrobe
County, PA
58 D
#9377 Live Oak
County, FL
58 D
#9378 Madison
County, NJ
58 D
#9379 Mapleton
County, UT
58 D
#9380 Mesa
County, AZ
58 D
#9381 Mesa
County, WA
58 D
#9382 Middleburg
County, FL
58 D
#9383 Millington
County, TN
58 D
#9384 Mission
County, TX
58 D
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.