City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#361
Greentown
County, IN
100 A
#362 Greenville
County, RI
100 A
#363 Greenville
County, WI
100 A
#364 Greenwood
County, SC
100 A
#365 Grizzly Flats
County, CA
100 A
#366 Grosse Pointe Shores
County, MI
100 A
#367 Grove City
County, OH
100 A
#368 Groveland
County, IL
100 A
#369 Gualala
County, CA
100 A
#370 Gunnison
County, CO
100 A
#371 Guyton
County, GA
100 A
#372 Hallowell
County, ME
100 A
#373 Halls
County, TN
100 A
#374 Hamburg
County, AR
100 A
#375 Hampden
County, ME
100 A
#376 Hancocks Bridge
County, NJ
100 A
#377 Hanover
County, VA
100 A
#378 Happy Valley
County, OR
100 A
#379 Hardin
County, IL
100 A
#380 Harpersville
County, AL
100 A
#381 Harrison
County, MI
100 A
#382 Harrison Township
County, MI
100 A
#383 Hartford
County, WI
100 A
#384 Hartland
County, MI
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.