City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#2401
Gettysburg
County, SD
96 A
#2402 Gibbon
County, NE
96 A
#2403 Gilroy
County, CA
96 A
#2404 Girard
County, PA
96 A
#2405 Glencoe
County, AL
96 A
#2406 Glendale
County, CO
96 A
#2407 Glendora
County, CA
96 A
#2408 Goldbar
County, WA
96 A
#2409 Gonzales
County, LA
96 A
#2410 Goodyear
County, AZ
96 A
#2411 Goose Creek
County, SC
96 A
#2412 Graham
County, NC
96 A
#2413 Grahamsville
County, NY
96 A
#2414 Grand Haven
County, MI
96 A
#2415 Grand Lake
County, CO
96 A
#2416 Grand Prairie
County, TX
96 A
#2417 Grandview
County, MO
96 A
#2418 Grant
County, LA
96 A
#2419 Granville
County, NY
96 A
#2420 Grapevine
County, TX
96 A
#2421 Greenfield
County, TN
96 A
#2422 Greenville
County, NH
96 A
#2423 Greenville
County, SC
96 A
#2424 Greenwood
County, IN
96 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.