City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#433
Gosnell
County, AR
100 A
#434 Gower
County, MO
100 A
#435 Grady
County, AR
100 A
#436 Grand Bay
County, AL
100 A
#437 Grand Forks
County, ND
100 A
#438 Grand Rapids
County, OH
100 A
#439 Granite Bay
County, CA
100 A
#440 Grant
County, NE
100 A
#441 Grass Lake
County, MI
100 A
#442 Grawn
County, MI
100 A
#443 Graysville
County, AL
100 A
#444 Great Neck
County, NY
100 A
#445 Green River
County, WY
100 A
#446 Greentown
County, IN
100 A
#447 Greenville
County, RI
100 A
#448 Greenville
County, WI
100 A
#449 Greenwood
County, SC
100 A
#450 Grizzly Flats
County, CA
100 A
#451 Grosse Pointe
County, MI
100 A
#452 Grosse Pointe Shores
County, MI
100 A
#453 Grove City
County, OH
100 A
#454 Groveland
County, IL
100 A
#455 Gualala
County, CA
100 A
#456 Gunnison
County, CO
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.