City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10249
Sierra Blanca
County, TX
40 F
#10250 Theodore
County, AL
40 F
#10251 Thompsontown
County, PA
40 F
#10252 Thorp
County, WI
40 F
#10253 Titusville
County, FL
40 F
#10254 Unadilla
County, NY
40 F
#10255 Union City
County, GA
40 F
#10256 Utica
County, IL
40 F
#10257 Ville Platte
County, LA
40 F
#10258 Vine Grove
County, KY
40 F
#10259 Warren
County, RI
40 F
#10260 Woodbine
County, NJ
40 F
#10261 Algonquin
County, IL
39 F
#10262 Belmar
County, NJ
39 F
#10263 Biscoe
County, NC
39 F
#10264 Centre Hall
County, PA
39 F
#10265 Chicago
County, IL
39 F
#10266 Douglass
County, TX
39 F
#10267 East Brunswick
County, NJ
39 F
#10268 Edgewood
County, TX
39 F
#10269 Flagstaff
County, AZ
39 F
#10270 Ilion
County, NY
39 F
#10271 Kenedy
County, TX
39 F
#10272 Largo
County, FL
39 F
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.