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.