City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#961
Seminole
County, OK
100 A
#962 Seneca
County, SC
100 A
#963 Seneca Falls
County, NY
100 A
#964 Seven Fields
County, PA
100 A
#965 Shafter
County, CA
100 A
#966 Shakopee
County, MN
100 A
#967 Shannon Hills
County, AR
100 A
#968 Shasta
County, CA
100 A
#969 Shasta Lake
County, CA
100 A
#970 Sheffield Lake
County, OH
100 A
#971 Sheffield Village
County, OH
100 A
#972 Shelbina
County, MO
100 A
#973 Shelby Township
County, MI
100 A
#974 Shelbyville
County, MO
100 A
#975 Shenandoah
County, TX
100 A
#976 Sherburne
County, NY
100 A
#977 Sherrill
County, NY
100 A
#978 Shoshone
County, ID
100 A
#979 Silver Lake
County, KS
100 A
#980 Silver Spring
County, MD
100 A
#981 Silverhill
County, AL
100 A
#982 Silverstreet
County, SC
100 A
#983 Skyforest
County, CA
100 A
#984 Sleepy Eye
County, MN
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.