City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#2737
Sibley
County, LA
96 A
#2738 Sibley
County, MO
96 A
#2739 Sidney
County, MT
96 A
#2740 Silver Bay
County, NY
96 A
#2741 Silver Lake
County, IN
96 A
#2742 Sister Bay
County, WI
96 A
#2743 Sisters
County, OR
96 A
#2744 Slagle
County, LA
96 A
#2745 Smiths Station
County, AL
96 A
#2746 Smyrna
County, GA
96 A
#2747 Snohomish
County, WA
96 A
#2748 Snoqualmie
County, WA
96 A
#2749 Soda Springs
County, ID
96 A
#2750 Somerville
County, TN
96 A
#2751 South Boston
County, VA
96 A
#2752 South Lyon
County, MI
96 A
#2753 Soutwest City
County, MO
96 A
#2754 Sparta
County, NC
96 A
#2755 Spartanburg
County, SC
96 A
#2756 Speedway
County, IN
96 A
#2757 Spring Lake
County, MI
96 A
#2758 Spring Valley
County, MN
96 A
#2759 Springville
County, IA
96 A
#2760 St Elmo
County, AL
96 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.