The EPA is considering putting the St. Clair Shores area at Bon Brae and Harper Avenue on the National Priorities List (NPL). The area has been plagued by PCB contamination since they were discovered in 2001 when officials were attempting to get a dredging permit. The good news is that the sites that get put on Superfund's NPL are eligible to get federal funds.
The St. Clair Shores Drain (SCSD) eventually drains into Lake St. Clair by way of the Lange Street Canal and Revere Street Canal. While drinking water is safe, according to the EPA the main pathways of exposure are through eating fish in the canals, surface water, soil, or the sediments in the canals especially in the areas where the drain discharges.
In 2002 sediment was removed from the two canals though they have been re-contaminated since then. In 2006 the EPA installed a liner in the portion of the storm sewer where the contamination is the heaviest. The storm sewer has also been re-contaminated as well.
Here is the EPA document describing the site as well as the EPA's findings
The Gratiot County Golf Course in St. Louis Michigan has been designated as a superfund NPL site. From 1956 to 1970 the Velsicol Chemical plant disposed of liquid hazardous waste by burning it at the site. In 1982 the site was put on the NPL and 68,000 cubic yards of soil was removed from the site and it was taken off of the NPL. In 2006 more contamonation of soil and groundwater was found so now the site is back onto the NPL.