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 |
| Targhee Nf-Alpine Cg | Duck Creek Village, WY | 200 | 22 | - |
| Stone Gate Estates | Gillette, WY | 198 | 10 | - |
| Edgerton, Town Of | Edgerton, WY | 195 | 25 | - |
| Force Road Joint Powers Board | Gillette, WY | 195 | 22 | - |
| Elk Mountain, Town Of | Elk Mountain, WY | 191 | 91 | - |
| Bridger Coal Company-Admin | Point of Rocks, WY | 191 | 8 | - |
| Medicine Bow, Town Of | Medicine Bow, WY | 189 | 42 | - |
| Sweetwater County Airport | Rock Springs, WY | 189 | 27 | - |
| Albin, Town Of | Albin, WY | 181 | 228 | - |
| Wydot-I25 Port of Entry | Cheyenne, WY | 180 | 0 | - |
| Bentonite Performance Minerals - Colony | Belle Fourche, WY | 180 | 35 | - |
| Deaver Municipal Water System | Deaver, WY | 176 | 18 | - |
| People`s Improvement & Service District | Gillette, WY | 176 | 78 | - |
| Bunkhouse Bar and Grill | Cheyenne, WY | 174 | 32 | - |
| Y-O Investments, Inc. | Jackson, WY | 173 | 41 | - |
| Red Vista & Ten Sleep Brewery WS | Ten Sleep, WY | 173 | 4 | - |
| Lex Mobile Home Park | Casper, WY | 172 | 1 | - |
| Fireside Resort Incorporated | Wilson, WY | 170 | 56 | - |
| North Antelope Coal Mine | Wright, WY | 170 | 2 | - |
| Dyno Nobel, Inc | Cheyenne, WY | 170 | 9 | - |
| Snow King Mountain Resort Summit WS | Jackson, WY | 170 | 0 | - |
| WY DOT-Highway 339 Port of Entry | Sheridan, WY | 168 | 4 | - |
| Gtnp- Triangle X Ranch | Moose, WY | 166 | 2 | - |
| Mountain View Acres | Pavillion, WY | 165 | 26 | - |
| Douglas KOA Cg & Pine Meadows MHP | Douglas, WY | 165 | 25 | - |
| Dave Johnston Power Plant | Glenrock, WY | 165 | 39 | - |
| Black Hills Nf-Cook Lake Cg | Spearfish, WY | 165 | 17 | - |
| Stagecoach Bar Incorporated | Wilson, WY | 163 | 31 | - |
| Gtnp-Jenny Lake Lodge | Moose, WY | 163 | 1 | - |
| Frannie, Town Of | Frannie, WY | 160 | 28 | - |
| Squaw Creek Water District | Wilson, WY | 160 | 207 | - |
| Gilchrist Elementary | Cheyenne,, WY | 160 | 12 | - |
| Terry Bison Ranch | Cheyenne, WY | 160 | 23 | - |
| Gros Ventre North HOA | Wilson, WY | 160 | 170 | - |
| Jacz Drive in and RV Park | Etna, WY | 158 | 10 | - |
| Antelope Truck Stop | Burns, WY | 157 | 53 | - |
| Shoshone Nf-Wapiti Cg & Rs | Cody, WY | 157 | 11 | - |
| Glendo St Park Headquarters | Guernsey, WY | 156 | 8 | - |
| Bhnf--Burgess Jct Visitor Cntr | Sheridan, WY | 155 | 18 | - |
| Black Hills Power Incorporated | Gillette, WY | 154 | 10 | - |
| Lyman KOA Campground | Lyman, WY | 154 | 27 | - |
| Meadowlark Lake Lodge | Buffalo, WY | 154 | 28 | - |
| Wilson Gas | Wilson, WY | 154 | 47 | - |
| Hf Bar Ranch | Saddlestring, WY | 153 | 24 | - |
| Englewood Village MHP | Cheyenne, WY | 152 | 3 | - |
| First Fike Subdivision | Pavillion, WY | 150 | 13 | Clean |
| Evans Mobile Home Court | Wilson, WY | 150 | 21 | - |
| Bald Mountain Trailer Court | Gillette, WY | 150 | 44 | - |
| Black Butte Coal Company | Point of Rocks, WY | 150 | 8 | - |
| Indian Paintbrush Water District | Wilson, WY | 150 | 209 | - |