City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#8209
Fairmont
County, WV
74 C
#8210 Farmington
County, NH
74 C
#8211 Fentress
County, TX
74 C
#8212 Forest
County, OH
74 C
#8213 Forreston
County, TX
74 C
#8214 Fort Dodge
County, IA
74 C
#8215 Fosston
County, MN
74 C
#8216 Ganado
County, TX
74 C
#8217 Gardnerville
County, NV
74 C
#8218 Garrett
County, IN
74 C
#8219 Gilbert
County, SC
74 C
#8220 Gilford
County, NH
74 C
#8221 Glen Allen
County, AL
74 C
#8222 Glendale
County, AZ
74 C
#8223 Guttenberg
County, IA
74 C
#8224 Hamburg
County, NJ
74 C
#8225 Hardin
County, MT
74 C
#8226 Hessmer
County, LA
74 C
#8227 Hickory Flat
County, MS
74 C
#8228 Honeyville
County, UT
74 C
#8229 Horton
County, KS
74 C
#8230 Howard Lake
County, MN
74 C
#8231 Hughes Springs
County, TX
74 C
#8232 Idaho Falls
County, ID
74 C
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.