City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#745
Richmond
County, VA
100 A
#746 Ridgecrest
County, CA
100 A
#747 Ridgefield
County, WA
100 A
#748 Ridgely
County, MD
100 A
#749 Rio Dell
County, CA
100 A
#750 Rio Vista
County, CA
100 A
#751 Ripon
County, CA
100 A
#752 Riverdale
County, CA
100 A
#753 Riverside
County, CA
100 A
#754 Riverton
County, KS
100 A
#755 Riverview
County, FL
100 A
#756 Riverview
County, MI
100 A
#757 Roanoke
County, TX
100 A
#758 Robbinsdale
County, MN
100 A
#759 Rochester
County, MI
100 A
#760 Rochester Hills
County, MI
100 A
#761 Rock Spring
County, GA
100 A
#762 Rockville
County, MD
100 A
#763 Rockwood
County, MI
100 A
#764 Rocky Mount
County, VA
100 A
#765 Rocky Ridge
County, UT
100 A
#766 Rogers City
County, MI
100 A
#767 Roland
County, AR
100 A
#768 Rosamond
County, CA
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.