County issues public advisory after elevated PFAS found near Great Seneca Highway
County staff reported elevated per‑ and polyfluoroalkyl substances (PFAS) in a stream near the former Public Safety Training Academy adjacent to Great Seneca Highway. The county issued a public‑health advisory to avoid contact, is offering free well testing within a mile for fewer than 10 identified private wells, and plans additional water and soil testing with MDE.
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Sean O'Donnell told the council that the county and Maryland Department of the Environment found elevated PFAS levels in a small stream near Great Seneca Highway adjacent to the former Public Safety Training Academy. He said initial monitoring by DC Water and WSSC prompted further testing by MDE, which found higher concentrations in some locations.
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