City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#4393
Weber City
County, VA
92 A
#4394 Webster
County, WI
92 A
#4395 Weiser
County, ID
92 A
#4396 Wellman
County, IA
92 A
#4397 Wellpinit
County, WA
92 A
#4398 West Burlington
County, IA
92 A
#4399 Westminster
County, SC
92 A
#4400 Westmoreland
County, TN
92 A
#4401 Weston
County, WI
92 A
#4402 White Bear Lake
County, MN
92 A
#4403 Whitmire
County, SC
92 A
#4404 Willard
County, MO
92 A
#4405 Willards
County, MD
92 A
#4406 Williamsville
County, IL
92 A
#4407 Willmar
County, MN
92 A
#4408 Wilmer
County, TX
92 A
#4409 Wilson
County, NC
92 A
#4410 Wilson
County, WY
92 A
#4411 Wilton
County, ME
92 A
#4412 Wilton
County, NH
92 A
#4413 Winchester
County, VA
92 A
#4414 Winnebago
County, IL
92 A
#4415 Wiscasset
County, ME
92 A
#4416 Wolfeboro
County, NH
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.