City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1225
Granger
County, WA
99 A
#1226 Grass Valley
County, CA
99 A
#1227 Greenfield
County, IN
99 A
#1228 Greensboro
County, GA
99 A
#1229 Greenwood
County, MO
99 A
#1230 Guaynabo
County, PR
99 A
#1231 Hartwell
County, GA
99 A
#1232 Heflin
County, AL
99 A
#1233 Holland
County, MI
99 A
#1234 Honea Path
County, SC
99 A
#1235 Hurley
County, NM
99 A
#1236 Idyllwild
County, CA
99 A
#1237 Jamestown
County, ND
99 A
#1238 Jim Thorpe
County, PA
99 A
#1239 Joint Base Lewis-Mcchord
County, WA
99 A
#1240 Katy
County, TX
99 A
#1241 Kiawah Island
County, SC
99 A
#1242 Kimbolton
County, OH
99 A
#1243 Lafayette
County, GA
99 A
#1244 Langley
County, WA
99 A
#1245 Lewiston
County, NY
99 A
#1246 Lockport
County, NY
99 A
#1247 Long Bottom
County, OH
99 A
#1248 Longmont
County, CO
99 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.