City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#4777
Gladeville
County, TN
90 A
#4778 Glen Alpine
County, NC
90 A
#4779 Glenn Heights
County, TX
90 A
#4780 Glenpool
County, OK
90 A
#4781 Gloversville
County, NY
90 A
#4782 Granby
County, CT
90 A
#4783 Grand Marais
County, MN
90 A
#4784 Grants Pass
County, OR
90 A
#4785 Great Lakes
County, IL
90 A
#4786 Greendale
County, WI
90 A
#4787 Greenup
County, IL
90 A
#4788 Grennsburg
County, KY
90 A
#4789 Grove Hill
County, AL
90 A
#4790 Grundy Center
County, IA
90 A
#4791 Guernsey
County, WY
90 A
#4792 Gunter
County, TX
90 A
#4793 Hailey
County, ID
90 A
#4794 Hallsville
County, TX
90 A
#4795 Hamel
County, MN
90 A
#4796 Hampton Bays
County, NY
90 A
#4797 Hampton Twp
County, NJ
90 A
#4798 Happy Jack
County, AZ
90 A
#4799 Harmony
County, MN
90 A
#4800 Harmony
County, PA
90 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.