Water quality by county
in District of Columbia
EPA sampled public water systems across District of Columbia for PFAS under its UCMR 5 programme. Of the 1 counties, 0 have a reading above a federal limit and 0 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 |
|---|---|---|---|
| District of Columbia | 702,250 | under the limit | — |