WASHINGTON COUNTY LEAD DISTRICT - POTOSI
Superfund Site Profile
The Washington County Lead District – Potosi Site includes soil, groundwater, surface water and sediment contaminated with arsenic, barium, cadmium and lead associated with historical mining practices in southeast Missouri. The site encompasses about 47 square miles in the northeastern portion of Washington County, Missouri.
Washington County is part of Missouri's Old Lead Belt, where lead mining occurred for hundreds of years. While it was being mined, the Old Lead Belt provided about 80 percent of the lead produced in the United States. In Washington County, the first mines were mostly surface diggings advanced by manual labor with a pick and ...
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