Water quality by county
in Vermont
EPA sampled public water systems across Vermont for PFAS under its UCMR 5 programme. Of the 14 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 |
|---|---|---|---|
| Washington County | 59,844 | 1.1× | PFOS · 4.6 ng/L |
| Addison County | 38,047 | under the limit | — |
| Bennington County | 37,039 | under the limit | — |
| Caledonia County | 30,535 | under the limit | — |
| Chittenden County | 170,851 | under the limit | — |
| Essex County | 6,037 | not sampled | — |
| Franklin County | 51,066 | under the limit | — |
| Grand Isle County | 7,528 | not sampled | — |
| Lamoille County | 26,248 | under the limit | — |
| Orange County | 30,050 | not sampled | — |
| Orleans County | 27,726 | under the limit | — |
| Rutland County | 60,198 | under the limit | — |
| Windham County | 45,627 | under the limit | — |
| Windsor County | 57,697 | under the limit | — |