An official website of the United States government.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

St. Marys River Area of Concern

The St. Mary's River was designated an Area of Concern under the 1987 Great Lakes Water Quality Agreement. Industrial and municipal discharges as well as combined sewer overflows caused impairments of water quality, sediment and biota at the AOC. Priorities for the AOC include restoration of tributaries, cleanup of the Cannelton Tannery Superfund site, sea lamprey control, elimination of combined sewer overflows and remediation of contaminated sediments.