City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1057
Tivoli
County, NY
100 A
#1058 Tolland
County, CT
100 A
#1059 Toluca
County, IL
100 A
#1060 Tonawanda
County, NY
100 A
#1061 Topeka
County, IN
100 A
#1062 Topsham
County, ME
100 A
#1063 Toronto
County, SD
100 A
#1064 Tremont
County, IL
100 A
#1065 Trempealeau
County, WI
100 A
#1066 Trenton
County, MI
100 A
#1067 Trinity
County, AL
100 A
#1068 Trona
County, CA
100 A
#1069 Trophy Club
County, TX
100 A
#1070 Troy
County, VA
100 A
#1071 Tucumcari
County, NM
100 A
#1072 Tukwila
County, WA
100 A
#1073 Turtle Lake
County, ND
100 A
#1074 Twain Harte
County, CA
100 A
#1075 Twisp
County, WA
100 A
#1076 Tybee Island
County, GA
100 A
#1077 Uncasville
County, CT
100 A
#1078 Union
County, OH
100 A
#1079 Union Springs
County, NY
100 A
#1080 Universal City
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.