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 | — |