City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#985
Smith River
County, CA
100 A
#986 Smyrna
County, DE
100 A
#987 Snoqualime
County, WA
100 A
#988 Somers
County, NY
100 A
#989 Somers
County, WI
100 A
#990 Somonauk
County, IL
100 A
#991 Soquel
County, CA
100 A
#992 South Paris
County, ME
100 A
#993 South Range
County, MI
100 A
#994 South Rockwood
County, MI
100 A
#995 South Sioux City
County, NE
100 A
#996 Spearfish
County, SD
100 A
#997 Spencerville
County, OH
100 A
#998 Spicer
County, MN
100 A
#999 Spring Valley
County, CA
100 A
#1000 Springboro
County, OH
100 A
#1001 Springdale
County, AR
100 A
#1002 Springfield
County, NE
100 A
#1003 St Henry
County, OH
100 A
#1004 St Paul
County, NE
100 A
#1005 St. Cloud
County, MN
100 A
#1006 St. Francis
County, MN
100 A
#1007 St. Johns
County, MI
100 A
#1008 St. Joseph
County, MI
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.