City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9529
Weatherford
County, TX
56 D
#9530 Webbers Falls
County, OK
56 D
#9531 Welaka
County, FL
56 D
#9532 Weston
County, FL
56 D
#9533 White Sands Missile Range
County, NM
56 D
#9534 Wichita Falls
County, TX
56 D
#9535 Williamstown
County, NJ
56 D
#9536 Woodstock
County, IL
56 D
#9537 Yancey
County, TX
56 D
#9538 Aberdeen
County, SD
55 D
#9539 Attleboro
County, MA
55 D
#9540 Bellville
County, TX
55 D
#9541 Caguas
County, PR
55 D
#9542 Casey
County, IL
55 D
#9543 Charleroi
County, PA
55 D
#9544 Chesnee
County, SC
55 D
#9545 Decatur
County, TX
55 D
#9546 Deer Park
County, WA
55 D
#9547 Denton
County, NC
55 D
#9548 Deweyville
County, TX
55 D
#9549 Eustace
County, TX
55 D
#9550 Franklin
County, NC
55 D
#9551 Frisco
County, CO
55 D
#9552 Gladwin
County, MI
55 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.