City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#11569
Richboro
County, PA
0 F
#11570 Richland
County, MS
0 F
#11571 Richton Park
County, IL
0 F
#11572 Richwood
County, WV
0 F
#11573 Ridgewood
County, NJ
0 F
#11574 Riesel
County, TX
0 F
#11575 Riverside
County, TX
0 F
#11576 Robbins
County, IL
0 F
#11577 Robbins
County, NC
0 F
#11578 Roma
County, TX
0 F
#11579 Ronceverte
County, WV
0 F
#11580 Roslyn Heights
County, NY
0 F
#11581 Rosston
County, AR
0 F
#11582 Rotan
County, TX
0 F
#11583 Royalton
County, IL
0 F
#11584 Runaway Bay
County, TX
0 F
#11585 Saint Albans
County, WV
0 F
#11586 Salem
County, WV
0 F
#11587 Salina
County, OK
0 F
#11588 San Diego
County, TX
0 F
#11589 San Juan
County, PR
0 F
#11590 San Rafael
County, NM
0 F
#11591 Santa Rosa
County, TX
0 F
#11592 Sargent
County, TX
0 F
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.