City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#4033
Georgetown
County, CO
92 A
#4034 Gering
County, NE
92 A
#4035 Gibraltar
County, MI
92 A
#4036 Gilbert
County, IA
92 A
#4037 Gilbert
County, MN
92 A
#4038 Gilberts
County, IL
92 A
#4039 Gorham
County, NY
92 A
#4040 Granby
County, MO
92 A
#4041 Grand Rapids
County, MN
92 A
#4042 Grand Ronde
County, OR
92 A
#4043 Grant
County, AL
92 A
#4044 Green Forest
County, AR
92 A
#4045 Greendale
County, IN
92 A
#4046 Greene
County, NY
92 A
#4047 Greenfield
County, MO
92 A
#4048 Greenville
County, OH
92 A
#4049 Greenwood
County, WI
92 A
#4050 Gridley
County, IL
92 A
#4051 Griffith
County, IN
92 A
#4052 Grosse Pointe Farms
County, MI
92 A
#4053 Groton
County, SD
92 A
#4054 Groveport
County, OH
92 A
#4055 Haleyville
County, AL
92 A
#4056 Hampton
County, IA
92 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.