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Muskegon Lake AOC (delisted)

Contact

Stephanie Swart
SwartS@Michigan.gov
517-331-3779

On September 26, 2025, the US Environmental Protection Agency announced that the Muskegon Lake Area of Concern was "delisted" or removed from the international list of Great Lakes AOCs following successful restoration efforts.

Muskegon Lake, located on the shoreline of Lake Michigan in the Lower Peninsula, is a 4,149-acre drowned river mouth connected to Lake Michigan by a navigation channel. The Muskegon Lake Area of Concern includes Muskegon Lake and portions of the lake's tributaries, Ruddiman, Ryerson, Four Mile, Bear, and Green Creeks and Bear Lake. Sediments within the Muskegon Lake Area of Concern were contaminated with excessive nutrients, heavy metals, petrochemicals, pesticides, and polychlorinated biphenyls from historical municipal and industrial discharges to surface water.