City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10321
Loose Creek
County, MO
37 F
#10322 Malvern
County, OH
37 F
#10323 Martin
County, KY
37 F
#10324 Mercedes
County, TX
37 F
#10325 Mexico Beach
County, FL
37 F
#10326 Mound Bayou
County, MS
37 F
#10327 Newtown
County, CT
37 F
#10328 Norwood
County, NC
37 F
#10329 Perry
County, IA
37 F
#10330 Port Aransas
County, TX
37 F
#10331 Spring Hope
County, NC
37 F
#10332 Troy
County, NC
37 F
#10333 Tuscola
County, IL
37 F
#10334 Waldwick
County, NJ
37 F
#10335 Wanaque
County, NJ
37 F
#10336 Waverly
County, TN
37 F
#10337 White Hall
County, IL
37 F
#10338 Wilson
County, OK
37 F
#10339 Barranquitas
County, PR
36 F
#10340 Belpre
County, OH
36 F
#10341 Bloomfield
County, NJ
36 F
#10342 Calhoun Falls
County, SC
36 F
#10343 Cankton
County, LA
36 F
#10344 Chandler
County, TX
36 F
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.