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WY tap water quality, city by city
115 cities and towns in WY are served by an active community water system in the EPA's records. Each page below translates that system's EPA-reported history into plain English.
According to EPA SDWIS data, retrieved June 2026.
- Afton
- Aladdin
- Albin
- Alpine
- Auburn
- Baggs
- Bairoil
- Bar Nunn
- Basin
- Bear River
- Bedford
- Big Piney
- Buffalo
- Burlington
- Burns
- Byron
- Casper
- Cheyenne
- Chugwater
- Clearmont
- Cody
- Cokeville
- Cowley
- Dayton
- Deaver
- Dixon
- Douglas
- Dubois
- East Thermopolis
- Edgerton
- Elk Mountain
- Encampment
- Ethete
- Etna
- Evanston
- Evansville
- F.E. Warren Afb
- Fairview
- Fort Laramie
- Fort Washakie
- Frannie
- Gillette
- Glendo
- Glenrock
- Granger
- Green River
- Greybull
- Grover
- Guernsey
- Hanna
- Hartville
- Hudson
- Hulett
- Hyattville
- Jackson
- Jeffrey City
- Kaycee
- Kemmerer
- Kirby
- La Barge
- La Grange
- Lance Creek
- Lander
- Laramie
- Lingle
- Little America
- Lovell
- Lusk
- Lyman
- Manville
- Marbleton
- Medicine Bow
- Meeteetse
- Midwest
- Mills
- Moorcroft
- Moose
- Moran
- Mountain View
- Newcastle
- Opal
- Osage
- Pavillion
- Pinedale
- Point Of Rocks
- Powell
- Ranchester
- Rawlins
- Riverton
- Rock River
- Rock Springs
- Rolling Hills
- Saratoga
- Shell
- Sheridan
- Shoshoni
- Sinclair
- Smoot
- Star Valley Ranch
- Sundance
- Superior
- Ten Sleep
- Teton Village
- Thayne
- Thermopolis
- Torrington
- Upton
- Wamsutter
- Wheatland
- Wilson
- Worland
- Wright
- Yellowstone
- Yellowstone National Park
- Yoder