Water quality by county
in Wyoming
EPA sampled public water systems across Wyoming for PFAS under its UCMR 5 programme. Of the 23 counties, 1 have a reading above a federal limit and 3 have not been sampled at all — which is not a clean result, only an absence of one. Each county below shows what was found, at what concentration, and at which utility.
| county | Population | Worst result | Compound |
|---|---|---|---|
| Fremont County | 39,721 | 3.7× | PFHxS · 37 ng/L |
| Teton County | 23,272 | under the limit | PFHxS · 3.3 ng/L |
| Albany County | 39,288 | under the limit | — |
| Big Horn County | 12,084 | under the limit | — |
| Campbell County | 47,946 | under the limit | — |
| Carbon County | 14,250 | under the limit | — |
| Converse County | 13,766 | under the limit | — |
| Crook County | 7,775 | not sampled | — |
| Goshen County | 12,635 | under the limit | — |
| Hot Springs County | 4,625 | not sampled | — |
| Johnson County | 8,803 | under the limit | — |
| Laramie County | 101,783 | under the limit | — |
| Lincoln County | 21,000 | under the limit | — |
| Natrona County | 80,410 | under the limit | — |
| Niobrara County | 2,301 | not sampled | — |
| Park County | 31,082 | under the limit | — |
| Platte County | 8,512 | under the limit | — |
| Sheridan County | 32,978 | under the limit | — |
| Sublette County | 8,965 | under the limit | — |
| Sweetwater County | 41,273 | under the limit | — |
| Uinta County | 20,621 | under the limit | — |
| Washakie County | 7,662 | under the limit | — |
| Weston County | 6,866 | under the limit | — |