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 |
| Owl Creek Water District | Thermopolis, WY | 100 | 19 | - |
| O Bar B Improvement & Service District | Jackson, WY | 100 | 3 | - |
| Bhnf-Boulder Park Cg | Sheridan, WY | 100 | 16 | - |
| Bhnf-Sitting Bull Cg | Sheridan, WY | 100 | 20 | - |
| Shoshone Nf-Falls Cg | Dubois, WY | 100 | 3 | - |
| Btnf-Granite Creek Cg | Jackson, WY | 100 | 28 | - |
| Keyhole St Park Headquarters | Moorcroft, WY | 100 | 13 | - |
| Nps Fossil Butte Natl Monument | Kemmerer, WY | 100 | 3 | - |
| Beulah Campground | Wright, WY | 99 | 0 | - |
| Deer Haven Mobile Home Park | Saratoga, WY | 98 | 29 | - |
| Elk View Inn | Dayton, WY | 98 | 30 | - |
| Manville, Town Of | Manville, WY | 97 | 314 | - |
| Play Park LLC | Gillette, WY | 96 | 9 | - |
| Rivers Bend Trailer Court | Powell, WY | 96 | 56 | - |
| Mhvc 66 Ranch | Casper, WY | 96 | 6 | - |
| Longhorn RV and Motel | Saratoga Springs, WY | 96 | 9 | - |
| Whiskey Mountain Conservation Camp | Cheyenne, WY | 96 | 5 | - |
| We Soda Alkali, LP-Granger Facility | Green River, WY | 95 | 38 | - |
| Cottonwood Acres | Torrington, WY | 95 | 33 | - |
| Lds Wheatland Church | Manassa, WY | 95 | 5 | - |
| Carpenter W&S District | Cheyenne, WY | 94 | 65 | - |
| Ynp-Slough Creek Cg | Yellowstone National Park, WY | 94 | 9 | - |
| Meeks Cabin Campground | South Jordan, WY | 94 | 2 | - |
| Bear Lodge | Dayton, WY | 93 | 33 | - |
| American Colloid Company | Colony, WY | 93 | 31 | - |
| Meadowlark Ski Resort | Buffalo, WY | 92 | 38 | - |
| Jonah Energy LLC Field Office | Denver, WY | 92 | 3 | - |
| Paradise Guest Ranch | Buffalo, WY | 90 | 20 | - |
| Georgia-Pacific Gypsum LLC | Lovell, WY | 90 | 37 | - |
| Boysen St Pk Hdqrts | Shoshoni, WY | 90 | 14 | - |
| Sloanes General Store | Alcova, WY | 90 | 17 | - |
| Turnerville Water and Sewer District | Grover, WY | 90 | 73 | - |
| Los Comales LLC | Gillette, WY | 90 | 17 | - |
| Mountain Cement Company | Laramie, WY | 90 | 155 | - |
| Devils Tower Forest Products | Spearfish, WY | 90 | 2 | - |
| Gtnp-Lizard Creek Cg | Moose, WY | 90 | 0 | - |
| Fort Phil Kearny St Hist Site | Banner, WY | 89 | 19 | - |
| HI-Country Water District | Wilson, WY | 85 | 59 | - |
| Alpine Science Institute | Lander, WY | 85 | 152 | - |
| Rozet Ranchettes I&s District | Gillette, WY | 85 | 12 | - |
| Vore Buffalo Jump Foundation | Belle Fourche, WY | 85 | 3 | - |
| Greybull Heights Water Users | Greybull, WY | 84 | 12 | - |
| Star View Estates | Auburn, WY | 84 | 33 | - |
| Westview Village | Grover, WY | 83 | 65 | - |
| Raintree Estates | Riverton, WY | 83 | 15 | - |
| Cheyenne RV Resort, LLC | Cheyenne, WY | 82 | 16 | - |
| WY DOT-Driver Services Center | Cheyenne, WY | 80 | 0 | - |
| Buckskin Mining Company-Kiewit Corp | Gillette, WY | 80 | 8 | - |
| Hilcorp Carter Creek Gas Plant | Houston, WY | 80 | 57 | - |
| Lds Ten Sleep Meetinghouse | Salt Lake City, WY | 80 | 38 | - |