Superfund Site Profile


EPA is proposing a plan to clean up dioxin-contaminated sediment and riverbanks in Segments 4 and 5 of the Tittabawassee River. These segments include a six-mile stretch of the river starting about 11.5 miles downstream of the Dow Chemical Co. plant in Midland. EPA will select a final cleanup plan after reviewing comments received during the public comment period which ranfrom Sept. 22 through Nov. 6.

Read the documents below to learn more.

EPA Proposes Cleanup Plan for Tittabawassee River: Segments 4 & 5 (PDF) (8 pp, 693 K) September 2016 Factsheet

Tittabawassee River Segments 4 & 5 Response Proposal (PDF) (1,708 pp, 35 MB) May 31, 2016

Segment 4 & 5 Proposed Plan Public Meeting Presentation (43 pp, 1.7 MB) October 19, 2016




The Dow Chemical Company facility in Midland, Michigan, began operating in 1897. The 1,900-acre facility abuts the Tittabawassee River; most of the plant is located on the east side of the river and south of the city of Midland. At various times, the Midland Plant produced over 1,000 different organic and inorganic chemicals. Dioxins and furans were byproducts formed during the manufacture of chlorine-based products, including chlorophenolic compounds manufactured at the plant since the 1930s. Elevated dioxin levels in and along the Tittabawassee River and downstream appear to be primarily attributable to liquid wastes that were discharged in the past directly into the river from the facility.

Past waste disposal practices at the Midland Plant have resulted in on and off-site contamination that settled in some sediment and built up in some riverbanks and floodplain areas. Off-site contamination extends over 50 miles downstream through the Tittabawassee and Saginaw Rivers and into Saginaw Bay.



Historical influences on the Tittabawassee River (17:00) Exit EPA Disclaimer
This video demonstrates how natural processes and historical practices have led to the current distribution of contaminants within the Tittabawassee River and its floodplain, and how people or animals may be exposed to these contaminants. It was produced by Dow Chemical at the request of EPA and was completed in 2013.