Water quality by county
in Utah
EPA sampled public water systems across Utah for PFAS under its UCMR 5 programme. Of the 29 counties, 4 have a reading above a federal limit and 7 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 |
|---|---|---|---|
| Washington County | 207,943 | 6.5× | PFOS · 26 ng/L |
| Salt Lake County | 1,216,274 | 1.8× | PFHxS · 18.2 ng/L |
| Summit County | 43,109 | 1.7× | PFOS · 6.7 ng/L |
| Davis County | 378,470 | 1.2× | PFHxS · 12 ng/L |
| Beaver County | 7,424 | not sampled | — |
| Box Elder County | 64,120 | under the limit | — |
| Cache County | 145,487 | under the limit | — |
| Carbon County | 20,613 | under the limit | — |
| Daggett County | 956 | not sampled | — |
| Duchesne County | 20,803 | under the limit | — |
| Emery County | 10,161 | not sampled | — |
| Garfield County | 5,290 | not sampled | — |
| Grand County | 9,788 | under the limit | — |
| Iron County | 65,936 | under the limit | — |
| Juab County | 13,297 | under the limit | — |
| Kane County | 8,525 | under the limit | — |
| Millard County | 13,572 | under the limit | — |
| Morgan County | 13,093 | under the limit | — |
| Piute County | 1,534 | not sampled | — |
| Rich County | 2,752 | not sampled | — |
| San Juan County | 14,601 | under the limit | — |
| Sanpete County | 30,732 | under the limit | — |
| Sevier County | 22,520 | under the limit | — |
| Tooele County | 84,488 | under the limit | — |
| Uintah County | 38,307 | under the limit | — |
| Utah County | 747,234 | under the limit | — |
| Wasatch County | 37,858 | under the limit | — |
| Wayne County | 2,608 | not sampled | — |
| Weber County | 276,118 | under the limit | — |