City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1009
St. Leonard
County, MD
100 A
#1010 St. Louis Park
County, MN
100 A
#1011 St. Peter
County, MN
100 A
#1012 Stanford
County, CA
100 A
#1013 Stanwood
County, MI
100 A
#1014 Starks
County, LA
100 A
#1015 Starr
County, SC
100 A
#1016 Start
County, LA
100 A
#1017 Steilacoom
County, WA
100 A
#1018 Sterling Heights
County, MI
100 A
#1019 Stockbridge
County, GA
100 A
#1020 Stokesdale
County, NC
100 A
#1021 Stony Creek
County, VA
100 A
#1022 Stowe
County, VT
100 A
#1023 Streetsboro
County, OH
100 A
#1024 Sturgeon Bay
County, WI
100 A
#1025 Suamico
County, WI
100 A
#1026 Sulphur Rock
County, AR
100 A
#1027 Sumas
County, WA
100 A
#1028 Sumner
County, IA
100 A
#1029 Sumner
County, IL
100 A
#1030 Sun Valley
County, NV
100 A
#1031 Sunnyvale
County, TX
100 A
#1032 Superior
County, NE
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.