City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3529
Robertsdale
County, AL
94 A
#3530 Rock Hill
County, SC
94 A
#3531 Rockford
County, MI
94 A
#3532 Rocksprings
County, TX
94 A
#3533 Rockville Centre
County, NY
94 A
#3534 Rockwood
County, TN
94 A
#3535 Rocky Mount
County, NC
94 A
#3536 Roseau
County, MN
94 A
#3537 Roseville
County, CA
94 A
#3538 Roy
County, UT
94 A
#3539 Ruston
County, LA
94 A
#3540 Rutledge
County, TN
94 A
#3541 Saco
County, ME
94 A
#3542 Salina
County, KS
94 A
#3543 Salisbury
County, MD
94 A
#3544 San Francisco
County, CA
94 A
#3545 Santa Maria
County, CA
94 A
#3546 Santa Nella
County, CA
94 A
#3547 Saraland
County, AL
94 A
#3548 Schaghticoke
County, NY
94 A
#3549 Scranton
County, SC
94 A
#3550 Sedalia
County, MO
94 A
#3551 Seeley Lake
County, MT
94 A
#3552 Seelyville
County, IN
94 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.