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 |
| Wydot-Gooseberry Ra | Meeteetse, WY | 350 | 22 | - |
| Burlington, Town Of | Burlington, WY | 348 | 23 | - |
| La Barge, Town Of | La Barge, WY | 347 | 57 | - |
| Breazeale's Mobile Home Park | Farmington Hills, WY | 345 | 3 | - |
| Superior, Town Of | Superior, WY | 336 | 192 | - |
| Terrace I Mhc | Farmington Hills, WY | 336 | 2 | - |
| Snake River Sporting Club | Wilson, WY | 332 | 7 | - |
| Horizon MHP | Rock Springs, WY | 330 | 5 | - |
| Riverside Mobile Home Court | Casper, WY | 330 | 10 | - |
| Meeteetse, Town Of | Meeteetse, WY | 327 | 29 | - |
| Cimmaron Village | Cheyenne, WY | 327 | 2 | - |
| Hidden Hills MHP | Farmington Hills, WY | 324 | 6 | - |
| Camp Loll- Boy Scouts of America | Ogden, WY | 320 | 14 | - |
| Terrace II Mhc | Farmington Hills, WY | 320 | 0 | - |
| Basin Electric Power Co-Op | Wheatland, WY | 310 | 27 | - |
| WY DOT-Port of Entry 85 | Cheyenne, WY | 308 | 4 | - |
| Freedom W&S District | Grover, WY | 307 | 61 | - |
| Rochelle Coal Mine | Wright, WY | 306 | 7 | - |
| Ten Mile Water and Sewer District | Rock Springs, WY | 305 | 9 | - |
| State Line Station | Sundance, WY | 305 | 44 | - |
| Highview Mfg Mobile Home Community (Mhc) | Gillette, WY | 304 | 46 | - |
| Arng-Guernsey Training Camp | Guernsey, WY | 302 | 9 | - |
| Eagle Specialty Materials, LLC-Belle Ayr | Gillette, WY | 300 | 3 | - |
| Gardens North Homeowners Association | Pavillion, WY | 300 | 17 | - |
| WY Trans Dept Waltman Ra | Shoshoni, WY | 300 | 7 | - |
| WY DOT-Cheyenne River Ra | Casper, WY | 300 | 13 | - |
| Mobile Corrals/Stalls Court | Rock Springs, WY | 300 | 7 | - |
| Simplot Phosphates, LLC | Rock Springs, WY | 300 | 4 | - |
| Jubys Mobile Home Park | Cody, WY | 300 | 20 | - |
| Targhee Nf-Reunion Flat Campground | Driggs, WY | 300 | 10 | - |
| Eagle Special. Mats, LLC-Rawhide School | Gillette, WY | 295 | 30 | - |
| Ynp -Lewis Lake Cg | Yellowstone, WY | 294 | 1 | - |
| Cook Road Water District | Gillette, WY | 291 | 12 | - |
| Glendo, Town Of | Glendo, WY | 289 | 52 | - |
| Curt Gowdy St Pk-Hq & Visitor Ctr | Cheyenne, WY | 286 | 44 | - |
| Eagle Spec. Mat., LLC-Eagle Butte Mine | Gillette, WY | 277 | 25 | - |
| Cathedral Home | Laramie, WY | 275 | 28 | - |
| Gtnp-Laurance S. Rockefeller Pc | Moose, WY | 275 | 0 | - |
| Togwotee Mountain Lodge | Moran, WY | 270 | 12 | - |
| Bar Y Estates/Gros Ventre West Wtr Dists | Wilson, WY | 270 | 151 | - |
| White Mountain Mobile Home Park | Rock Springs, WY | 270 | 16 | - |
| Green Valley MHP | Farmington Hills, WY | 265 | 3 | - |
| Kaycee, Town Of | Kaycee, WY | 263 | 24 | - |
| Nora's Fish Creek Inn | Wilson, WY | 263 | 31 | - |
| Orchard Valley Water Company | Cheyenne, WY | 260 | 19 | - |
| Skyline Ranch I&s District | Wilson, WY | 260 | 88 | - |
| Cedar Hills Water Association | Gillette, WY | 258 | 29 | - |
| East Thermopolis, Town Of | East Thermopolis, WY | 254 | 6 | - |
| Grover Water & Sewer District | Grover, WY | 252 | 46 | - |
| Osmond Pipeline Co | Afton, WY | 250 | 44 | - |