WaterQ

City Water Quality Rankings

11,696 cities ranked by drinking water quality.

Popular city water quality comparisons

Trending Cities

#3625
Troy
County, OH
94 A
#3626
Turlock
County, CA
94 A
#3627
Twentynine Palms
County, CA
94 A
#3628
Union Mills
County, IN
94 A
#3629
Upland
County, IN
94 A
#3630
Upton
County, NY
94 A
#3631
Usaf Academy
County, CO
94 A
#3632
Vanceburg
County, KY
94 A
#3633
Vanleer
County, TN
94 A
#3634
Veedersburg
County, IN
94 A
#3635
Vidalia
County, GA
94 A
#3636
Wadsworth
County, OH
94 A
#3637
Wahpeton
County, ND
94 A
#3638
Waikoloa
County, HI
94 A
#3639
Walkerton
County, IN
94 A
#3640
Walnut
County, CA
94 A
#3641
Walterboro
County, SC
94 A
#3642
Warren
County, MA
94 A
#3643
Washington Court House
County, OH
94 A
#3644
Watauga
County, TX
94 A
#3645
Watertown
County, SD
94 A
#3646
Waterville
County, MN
94 A
#3647
Wauwatosa
County, WI
94 A
#3648
Waverly
County, WV
94 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.

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