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Mechanical dredging of contaminated sediment in Ryerson Creek in the Muskegon Lake AOC.

Final Remaining BUI, Degradation of Benthos, Removed at Muskegon Lake AOC

The last remaining BUI in the Michigan AOC, the Degradation of Benthos, was removed after federal, state, and local partners determined that measures of benthic community health met established criteria.

December 12, 2024

BUIs

Muskegon Lake AOC

sediment

State partners collecting fish in the Black River via boat electrofishing as part of the sampling efforts to assess rates of tumors and deformities in the AOC. (Credit: OLEC)

Fish Tumors or Other Deformities BUI removed at Black River and Cuyahoga River AOCs

Tumors and deformities were historically elevated in fish populations in the Black River and Cuyahoga River Areas of Concern (AOCs) as a result of legacy industrial pollution and poor water quality. Contaminant source control and water quality improvements in both AOCs, and remediation work in the Black River AOC, reduced rates of fish tumors and deformities to meet Ohio’s AOC restoration targets, prompting the removal of the Fish Tumors and Other Deformities Beneficial Use Impairment (BUI) from these AOCs.

December 8, 2023

BUIs

Cuyahoga River AOC

fish

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Final Remaining BUI, Degradation of Benthos, Removed at Muskegon Lake AOC

Fish Tumors or Other Deformities BUI removed at Black River and Cuyahoga River AOCs

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