City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#2425
Groton
County, NY
96 A
#2426 Gruver
County, TX
96 A
#2427 Gulf Shores
County, AL
96 A
#2428 Guntersville
County, AL
96 A
#2429 Gurley
County, AL
96 A
#2430 Guthrie Center
County, IA
96 A
#2431 Gypsum
County, CO
96 A
#2432 Halifax
County, PA
96 A
#2433 Haltom City
County, TX
96 A
#2434 Hamilton
County, GA
96 A
#2435 Hamilton
County, NY
96 A
#2436 Hamilton
County, VA
96 A
#2437 Hampstead
County, MD
96 A
#2438 Hampton
County, SC
96 A
#2439 Hanford
County, CA
96 A
#2440 Hannibal
County, NY
96 A
#2441 Harlan
County, IA
96 A
#2442 Harlan
County, IN
96 A
#2443 Harper
County, KS
96 A
#2444 Harrisville
County, OH
96 A
#2445 Hartselle
County, AL
96 A
#2446 Harwich
County, MA
96 A
#2447 Hauser
County, ID
96 A
#2448 Hawkinsville
County, GA
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.