PlainWater

Public Water Systems

766 active public water systems in WY, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.

System Name Location Population Violations PFAS
Cheyenne Board of Public Utilities Cheyenne, WY 64,165 12 Clean
Casper, City Of Casper, WY 59,000 3 Clean
Laramie, City Of Laramie, WY 32,395 18 Clean
Gillette, City Of Gillette, WY 32,222 6 Clean
Jackson, Town Of Jackson, WY 24,760 283 Detected
Rock Springs, City Of Rock Springs, WY 24,000 5 Clean
Sheridan, City Of Sheridan, WY 22,700 22 Clean
Evanston, City Of Evanston, WY 12,000 3 Clean
Green River, City Of Green River, WY 10,500 5 Clean
Riverton, City Of Riverton, WY 10,330 11 Detected
Cody, City Of Cody, WY 10,224 11 Clean
South Cheyenne Water & Sewer District Cheyenne, WY 10,000 14 Clean
Rawlins Water Supply, City Of Rawlins, WY 9,006 72 Clean
Ynp-Old Faithful Yellowstone, WY 7,675 35 Clean
Lander, City Of Lander, WY 7,615 68 Clean
Northwest Rural Water District Cody, WY 7,330 4 Clean
Torrington Municipal Water Dept, City Of Torrington, WY 6,847 37 Clean
Douglas, City Of Douglas, WY 6,400 10 Detected
Powell, City Of Powell, WY 6,310 4 Clean
Ynp - Lake Village Yellowstone, WY 5,925 41 -
Usaf F.e. Warren Afb F.e. Warren Afb, WY 5,500 23 Clean
Worland Utilities Commission Worland, WY 5,487 19 Clean
Gtnp-Colter Bay Village Moose, WY 4,514 3 Clean
Buffalo, City Of Buffalo, WY 4,419 45 Clean
Ynp-Canyon Village Yellowstone, WY 4,300 9 Clean
Mills, City Of Mills, WY 4,050 12 Clean
Bar Nunn, Town Of Bar Nunn, WY 4,000 16 Clean
Wheatland, Town Of Wheatland, WY 3,659 227 Clean
Newcastle, City Of Newcastle, WY 3,595 240 Clean
Ynp-Grant Village Yellowstone, WY 3,513 1 -
Kemmerer-Diamondville Jpb Kemmerer, WY 3,348 53 Clean
Greybull, Town Of Greybull, WY 3,260 93 -
Devils Tower National Monument Devils Tower, WY 3,071 6 -
White Mountain W&S District Rock Springs, WY 3,000 0 -
Thermopolis, Town Of Thermopolis, WY 2,775 29 -
Evansville, Town Of Casper, WY 2,728 7 -
Ynp-Mammoth Hot Springs Yellowstone National Park, WY 2,600 14 -
Wright Water & Sewer District Wright, WY 2,500 8 -
Grand Targhee Resort Alta, WY 2,500 3 -
Glenrock, Town Of Glenrock, WY 2,466 9 -
Sleepy Hollow Subdivision Gillette, WY 2,400 24 -
Lovell, Town Of Lovell, WY 2,360 27 Clean
Lyman, Town Of Lyman, WY 2,203 32 -
Star Valley Ranch, Town Of Star Valley Ranch, WY 2,030 66 -
Rendezvous (R) Park Wilson, WY 2,006 1 -
Little America Hotels & Resorts, Inc- WY Little America, WY 2,004 108 -
Afton, Board of Pub Utilities Afton, WY 2,000 50 -
Arng-Camp Guernsey Cantonment Guernsey, WY 2,000 19 -
Leisure Valley Inc/ Star Valley RV Park Grover, WY 1,910 665 -
Pinedale Municipal WS Pinedale, WY 1,900 93 -
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