Wyoming PFAS compliance
PFAS contamination data for 500 water systems in Wyoming, serving 662,655 people.
Total systems
500
Exceed MCL
2
At risk
0
Compliant
31
Settlement eligible
18
Wyoming PFAS regulatory overview
State standards
Wyoming follows federal EPA MCLs (PFOA/PFOS: 4 ppt).
WY follows federal EPA MCLs. PFAS monitoring at FE Warren AFB and other sites.
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Water systems
| System | City | Population | PFOA (ppt) | PFOS (ppt) | Status |
|---|---|---|---|---|---|
| CHEYENNE BOARD OF PUBLIC UTILITIES WY5600011 | CHEYENNE | 64,165 | — | — | Compliant |
| CASPER, CITY OF WY5601415 | CASPER | 59,000 | — | — | Compliant |
| LARAMIE, CITY OF WY5600029 | LARAMIE | 32,395 | — | — | Compliant |
| GILLETTE, CITY OF WY5600019 | GILLETTE | 32,222 | — | — | Compliant |
| JACKSON, TOWN OF WY5600213 | JACKSON | 24,760 | — | — | Compliant |
| ROCK SPRINGS, CITY OF WY5601182 | ROCK SPRINGS | 24,000 | — | — | Compliant |
| SHERIDAN, CITY OF WY5600052 | SHERIDAN | 22,700 | — | — | Compliant |
| EVANSTON, CITY OF WY5600150 | EVANSTON | 12,000 | — | — | Compliant |
| GREEN RIVER, CITY OF WY5601181 | GREEN RIVER | 10,500 | — | — | Compliant |
| RIVERTON, CITY OF WY5600047 | RIVERTON | 10,330 | — | 7 | Exceeds |
| CODY, CITY OF WY5600207 | CODY | 10,224 | — | — | Compliant |
| SOUTH CHEYENNE WATER & SEWER DISTRICT WY5600239 | CHEYENNE | 10,000 | — | — | Compliant |
| RAWLINS WATER SUPPLY, CITY OF WY5600045 | RAWLINS | 9,006 | — | — | Compliant |
| YNP-OLD FAITHFUL WY5680085 | YELLOWSTONE | 7,675 | — | — | Compliant |
| LANDER, CITY OF WY5600176 | LANDER | 7,615 | — | — | Compliant |
| NORTHWEST RURAL WATER DISTRICT WY5601254 | CODY | 7,330 | — | — | Compliant |
| TORRINGTON MUNICIPAL WATER DEPT, CITY OF WY5600164 | TORRINGTON | 6,847 | — | — | Compliant |
| DOUGLAS, CITY OF WY5600137 | DOUGLAS | 6,400 | — | — | Compliant |
| POWELL, CITY OF WY5600042 | POWELL | 6,310 | — | — | Compliant |
| USAF F.E. WARREN AFB WY5680122 | F.E. WARREN AFB | 5,500 | — | — | Compliant |
| WORLAND UTILITIES COMMISSION WY5600197 | WORLAND | 5,487 | — | — | Compliant |
| GTNP-COLTER BAY VILLAGE WY5680095 | MOOSE | 4,514 | — | — | Compliant |
| BUFFALO, CITY OF WY5600005 | BUFFALO | 4,419 | — | — | Compliant |
| YNP-CANYON VILLAGE WY5680074 | YELLOWSTONE | 4,300 | — | — | Compliant |
| MILLS, CITY OF WY5600036 | MILLS | 4,050 | — | — | Compliant |
| BAR NUNN, TOWN OF WY5600067 | BAR NUNN | 4,000 | — | — | Compliant |
| WHEATLAND, TOWN OF WY5600187 | WHEATLAND | 3,659 | — | — | Compliant |
| NEWCASTLE, CITY OF WY5600256 | NEWCASTLE | 3,595 | — | — | Compliant |
| FORT WASHAKIE 085690003 | FORT WASHAKIE | 3,520 | 9.3 | — | Exceeds |
| KEMMERER-DIAMONDVILLE JPB WY5600028 | KEMMERER | 3,348 | — | — | Compliant |
| LOVELL, TOWN OF WY5600031 | LOVELL | 2,360 | — | — | Compliant |
| BLACK THUNDER COAL MINE WY5600360 | WRIGHT | 600 | — | — | Compliant |
| HIGH MEADOW RANCH WY5601569 | PINEDALE | 580 | — | — | Compliant |