City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#8977
Osborne
County, KS
64 C
#8978 Overton
County, NV
64 C
#8979 Palm Harbor
County, FL
64 C
#8980 Post
County, TX
64 C
#8981 Ripley
County, NY
64 C
#8982 Rockton
County, IL
64 C
#8983 Saint David
County, AZ
64 C
#8984 San Sebastian
County, PR
64 C
#8985 Seabrook
County, NJ
64 C
#8986 Sebree
County, KY
64 C
#8987 Seneca
County, IL
64 C
#8988 Sharon
County, WI
64 C
#8989 Sheffield
County, AL
64 C
#8990 Silverton
County, OR
64 C
#8991 Southbridge
County, MA
64 C
#8992 Stover
County, MO
64 C
#8993 Streamwood
County, IL
64 C
#8994 Sullivan
County, IL
64 C
#8995 Sycamore
County, IL
64 C
#8996 Troup
County, TX
64 C
#8997 Tucson
County, AZ
64 C
#8998 Tuolumne
County, CA
64 C
#8999 Ulysses
County, KS
64 C
#9000 Valley Mills
County, TX
64 C
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.