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 |
| Mbnf-South Brush Creek Cg (OR Cg Lower) | Saratoga, WY | 80 | 40 | - |
| Btnf-Green River Lake Cg | Jackson, WY | 80 | 5 | - |
| Btnf-Atherton Creek Cg | Jackson, WY | 80 | 10 | - |
| Shoshone Nf-Beartooth Lake Cg | Cody, WY | 80 | 6 | - |
| Camp Sacajawea | Casper, WY | 79 | 40 | - |
| Canyon Improvement & Service District | Newcastle, WY | 79 | 11 | - |
| Point of Rocks Mercantile | Point of Rocks, WY | 78 | 17 | - |
| Lakeside Lodge | Pinedale, WY | 78 | 29 | - |
| Platte River Campground | Craig, WY | 78 | 10 | - |
| Red Cliff Bible Camp | Pinedale, WY | 78 | 1 | - |
| Ward Creek Landowners Association | Gillette, WY | 77 | 219 | - |
| Buffalo Bill Sp-Lake Shore Campground | Cody, WY | 77 | 0 | - |
| Twin Pines RV Park | Lander, WY | 77 | 10 | - |
| South Fork Mountain Lodge | Buffalo, WY | 76 | 38 | - |
| C M Ranch LLC | Dubois, WY | 75 | 19 | - |
| Mountain View Estates (Knecht Invts) | Fort Collins, WY | 75 | 73 | - |
| Saddle Butte Water System | Jackson, WY | 75 | 0 | - |
| School Creek Mine | Wright, WY | 75 | 24 | - |
| Pineview I&s District | Gillette, WY | 75 | 53 | - |
| Wilson Park Subdivision | Wilson, WY | 75 | 0 | - |
| Dry Fork Station | Gillette, WY | 75 | 27 | - |
| WY Trans Dept Aladdin Welcome Ctr | Sundance, WY | 75 | 4 | - |
| Walcott Service | Walcott, WY | 75 | 4 | - |
| Shoshone Nf-Island Lake Cg | Cody, WY | 75 | 0 | - |
| Stroup Trailer Court | Gillette, WY | 74 | 335 | - |
| Jackson National Fish Hatchery | Jackson, WY | 74 | 6 | - |
| Gtnp- Climbers Ranch | Moose, WY | 74 | 1 | - |
| Moosehead Ranch | Moran, WY | 73 | 17 | - |
| Indian Springs Ranch HOA | Jackson, WY | 73 | 6 | - |
| University of Michigan Camp Davis | Jackson, WY | 73 | 12 | - |
| Elk Refuge Inn | Jackson, WY | 72 | 25 | - |
| Star Valley Trailer Court | Grover, WY | 72 | 94 | - |
| Wyoming Campground | Cheyenne, WY | 72 | 13 | - |
| Rodeo Flats | Gillette, WY | 72 | 0 | - |
| Bairoil, Town Of | Bairoil, WY | 71 | 34 | - |
| Btnf-Blackrock Ranger Station | Jackson, WY | 71 | 8 | - |
| Potlatch Trailer Court | Torrington, WY | 70 | 148 | - |
| Fremont County Youth Camp | Lander, WY | 70 | 19 | - |
| Heart Six Guest Ranch | Moran, WY | 70 | 69 | - |
| Lord of Lords Lutheran Church | Casper, WY | 70 | 18 | - |
| Ashley Nf-Firehole Recretional Area | Vernal, WY | 70 | 4 | - |
| Old West Cabins | Wilson, WY | 70 | 9 | - |
| Antelope Ridge HOA | Laramie, WY | 70 | 8 | - |
| Meadowlark Academy | Cheyenne, WY | 70 | 65 | - |
| Luton's Teton Cabins | Moran, WY | 70 | 3 | - |
| Sunset Ranch Water District | Newcastle, WY | 70 | 1 | - |
| Brinton Museum | Big Horn, WY | 69 | 4 | - |
| Warm Springs Water District | Dubois, WY | 68 | 66 | - |
| Bentonite Performance Minerals/Lovell | Lovell, WY | 68 | 19 | - |
| Triangle C Ranch | Dubois, WY | 67 | 61 | - |