City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1801
Richmond
County, MI
98 A
#1802 Richmond Hill
County, GA
98 A
#1803 Ridgeland
County, SC
98 A
#1804 Ritzville
County, WA
98 A
#1805 Riverside
County, AL
98 A
#1806 Roanoke Rapids
County, NC
98 A
#1807 Rochelle
County, GA
98 A
#1808 Rochester
County, MN
98 A
#1809 Rocky Ford
County, CO
98 A
#1810 Rogers
County, MN
98 A
#1811 Rogersville
County, AL
98 A
#1812 Rome
County, GA
98 A
#1813 Romulus
County, MI
98 A
#1814 Rosemead
County, CA
98 A
#1815 Rossburg
County, OH
98 A
#1816 Roswell
County, GA
98 A
#1817 Roy
County, WA
98 A
#1818 Sabana Grande
County, PR
98 A
#1819 Sandusky
County, MI
98 A
#1820 Sandwich
County, MA
98 A
#1821 Sanford
County, ME
98 A
#1822 Santee
County, CA
98 A
#1823 Schroon Lake
County, NY
98 A
#1824 Schulenberg
County, TX
98 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.