City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#913
Rockville
County, MD
100 A
#914 Rockwood
County, MI
100 A
#915 Rocky Mount
County, VA
100 A
#916 Rocky Ridge
County, UT
100 A
#917 Rogers
County, AR
100 A
#918 Rogers City
County, MI
100 A
#919 Roland
County, AR
100 A
#920 Rosamond
County, CA
100 A
#921 Roseville
County, MN
100 A
#922 Round Lake Heights
County, IL
100 A
#923 Rowlett
County, TX
100 A
#924 Roxboro
County, NC
100 A
#925 Royal Oak
County, MI
100 A
#926 Royal Oaks
County, CA
100 A
#927 Royalton
County, MN
100 A
#928 Rural Retreat
County, VA
100 A
#929 Russellville
County, TN
100 A
#930 Rutherfordton
County, NC
100 A
#931 Sabetha
County, KS
100 A
#932 Sachse
County, TX
100 A
#933 Salem
County, AR
100 A
#934 Salem
County, VA
100 A
#935 Samson
County, AL
100 A
#936 San Bruno
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.