City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#337
Germantown
County, OH
100 A
#338 Gibsonburg
County, OH
100 A
#339 Gilby
County, ND
100 A
#340 Gilcrest
County, CO
100 A
#341 Girard
County, OH
100 A
#342 Gladstone
County, MI
100 A
#343 Glencoe
County, MN
100 A
#344 Glendale
County, CA
100 A
#345 Glenwood Landing
County, NY
100 A
#346 Glenwood Springs
County, CO
100 A
#347 Golden
County, TX
100 A
#348 Goodhue
County, MN
100 A
#349 Gordonsville
County, TN
100 A
#350 Gower
County, MO
100 A
#351 Grand Bay
County, AL
100 A
#352 Grand Forks
County, ND
100 A
#353 Grand Rapids
County, OH
100 A
#354 Granite Bay
County, CA
100 A
#355 Grant
County, NE
100 A
#356 Grass Lake
County, MI
100 A
#357 Grawn
County, MI
100 A
#358 Graysville
County, AL
100 A
#359 Great Neck
County, NY
100 A
#360 Green River
County, WY
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.