City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#937
San Clemente
County, CA
100 A
#938 San Fernando
County, CA
100 A
#939 San Joaquin
County, CA
100 A
#940 San Miguel
County, CA
100 A
#941 Sandersville
County, GA
100 A
#942 Sandusky
County, OH
100 A
#943 Santa Clara
County, CA
100 A
#944 Santa Fe
County, TX
100 A
#945 Santa Fe Springs
County, CA
100 A
#946 Santa Paula
County, CA
100 A
#947 Saranac
County, NY
100 A
#948 Saranac Lake
County, NY
100 A
#949 Sausalito
County, CA
100 A
#950 Sautee-Nacoochee
County, GA
100 A
#951 Scarsdale
County, NY
100 A
#952 Schuyler
County, NE
100 A
#953 Scituate
County, RI
100 A
#954 Scottsbluff
County, NE
100 A
#955 Seabrook
County, TX
100 A
#956 Seal Beach
County, CA
100 A
#957 Seaside
County, CA
100 A
#958 Sebastopol
County, CA
100 A
#959 Sedro Woolley
County, WA
100 A
#960 Selma
County, TX
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.