City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9985
Lake Ozark
County, MO
53 D
#9986 Logan
County, UT
53 D
#9987 Luthersburg
County, PA
53 D
#9988 Macks Creek
County, MO
53 D
#9989 Mancos
County, CO
53 D
#9990 Maurice
County, LA
53 D
#9991 Monroe
County, NY
53 D
#9992 Morris
County, IL
53 D
#9993 Moweaqua
County, IL
53 D
#9994 Mulberry
County, FL
53 D
#9995 Nicholasville
County, KY
53 D
#9996 Ocean Springs
County, MS
53 D
#9997 Orlando
County, FL
53 D
#9998 Pauls Valley
County, OK
53 D
#9999 Ruidoso Downs
County, NM
53 D
#10000 Sandhill
County, MS
53 D
#10001 Savage
County, MN
53 D
#10002 Suwannee
County, FL
53 D
#10003 Tinley Park
County, IL
53 D
#10004 Aliquippa
County, PA
52 D
#10005 Alto
County, TX
52 D
#10006 Anna
County, TX
52 D
#10007 Bell City
County, LA
52 D
#10008 Bristol
County, FL
52 D
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.