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 |
| GLENDO ST PARK-BENNETT HILL CG | GUERNSEY, WY | 52 | 1 | — |
| LAKE WATER CO., LLC. | GLENDO, WY | 51 | 13 | — |
| C-V RANCHES (BOCES REG V) | WILSON, WY | 51 | 58 | — |
| SEMINOE BOAT CLUB, INC. | RAWLINS, WY | 50 | 17 | — |
| KEYHOLE RESORT/MARINA | GILLETTE, WY | 50 | 35 | — |
| BUFFALO VALLEY WATER DISTRICT | MORAN, WY | 50 | 46 | — |
| DEER HAVEN LODGE | ORONOCO, WY | 50 | 38 | — |
| GLENDO ST PARK WHISKEY GULCH | GUERNSEY, WY | 50 | 3 | — |
| GLENDO ST PARK COTTONWOOD | GUERNSEY, WY | 50 | 11 | — |
| BUFFALO BILL ST PK NORTH FORK | CODY, WY | 50 | 2 | — |
| GUERNSEY ST PARK LONG CANYON | GUERNSEY, WY | 50 | 4 | — |
| GUERNSEY ST PARK SANDY BEACH 1 | GUERNSEY, WY | 50 | 3 | — |
| GUERNSEY ST PARK SANDY BEACH 2 | GUERNSEY, WY | 50 | 3 | — |
| LAZY L AND B RANCH | DUBOIS, WY | 50 | 17 | — |
| THE DEN | FIRESTONE, WY | 50 | 37 | — |
| NE WY REGIONAL AIRPORT | GILLETTE, WY | 50 | 23 | — |
| FOUR J SCHOOL CAMPBELL SCH DIS | GILLETTE, WY | 50 | 46 | — |
| MHVC JACKSON CG | CASPER, WY | 50 | 2 | — |
| ALCOVA LAKEVIEW ESTATES I | CASPER, WY | 50 | 1 | — |
| ALTA SCHOOL | JACKSON, WY | 50 | 2 | — |
| WOLF DEN | THAYNE, WY | 50 | 5 | — |
| GREEN CREEK INN & RV | CODY, WY | 50 | 9 | — |
| ORIN JUNCTION TRUCK STOP | DOUGLAS, WY | 50 | 24 | — |
| SUNDANCE MEADOWS SPID | DOUGLAS, WY | 50 | 5 | — |
| SCHAREN SUBDIVISION | GREYBULL, WY | 50 | 2 | — |
| BEULAH LAND WATER | SIOUX FALLS, WY | 50 | 11 | — |
| AKAL ENERGY/TUMBLEWEED EXPRESS | LARAMIE, WY | 50 | 15 | — |
| HWY 390 LLC | WILSON, WY | 50 | 56 | — |
| GTNP-MORAN BUFFALO RANGER STATION | MOOSE, WY | 50 | 0 | — |
| BTNF-FREMONT LAKE CG | JACKSON, WY | 50 | 8 | — |
| BTNF-BLACKROCK WORK CENTER | JACKSON, WY | 50 | 679 | — |
| SHOSHONE NF-EAGLE CREEK CG | CODY, WY | 50 | 6 | — |
| MILE-HI I&S DISTRICT | CASPER, WY | 48 | 9 | — |
| BITTERROOT RANCH | DUBOIS, WY | 47 | 20 | — |
| LANCE CREEK WATER DISTRICT | LANCE CREEK, WY | 45 | 361 | — |
| KENNINGTON SPRINGS PIPELINE | FAIRVIEW, WY | 45 | 129 | — |
| AMERICAN COLLOID-COLONY EAST | COLONY, WY | 45 | 12 | — |
| LARSON'S PARK | GUERNSEY, WY | 45 | 7 | — |
| LOST CABIN GAS PLANT (CONTANGO RES, LLC) | LYSITE, WY | 45 | 24 | — |
| HILLIARD WARD (LDS CHURCH) | SALT LAKE CITY, WY | 45 | 19 | — |
| MEADOW SPRINGS IMP & SERV | GILLETTE, WY | 45 | 42 | — |
| WILSON HARDWARE | SALT LAKE CITY, WY | 45 | 28 | — |
| AKAL ENERGY-BUFORD OUTPOST | LARAMIE, WY | 44 | 9 | — |
| HAWK SPRINGS STATE RECREATION AREA | GUERNSEY, WY | 44 | 0 | — |
| DEVILS TOWER VIEW | DEVILS TOWER, WY | 43 | 24 | — |
| EDELWEISS | CLARK, WY | 42 | 27 | — |
| JUNIPER PARK WATER ASSOCIATION | PAVILLION, WY | 42 | 0 | — |
| WAPITI VILLAGE RV PARK | ALPINE, WY | 42 | 0 | — |
| COPPERLEAF WATER SYSTEM | CODY, WY | 42 | 4 | — |
| ELEPHANT HEAD LODGE | CODY, WY | 41 | 25 | — |