Gelman dioxane plume in Ann Arbor designated as a Superfund site

By: Kyle Davidson

Outlets: Michigan Advance

Published: March 12, 2026

Words: 534

Last Updated: 4 months, 3 weeks ago

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The U.S. Environmental Protection Agency on Thursday announced the Gelman Sciences Inc. site in Ann Arbor would be added to the Superfund National Priorities List.

Between 1963 and 1986 Gelman Sciences manufactured medical filters, discharging wastewater containing 1,4 dioxane, an industrial solvent, into surrounding ponds, creating a groundwater plume. The plume is approximately three miles long and one mile wide, and has migrated into aquifers that supply drinking water.

“With this Superfund designation, …

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