"General Motors was rated as the 19th worst polluter on the Political Economy Research Institute's (PERI) Toxic 100 index. PERI is an “independent unit of the University of Massachusetts,” that promotes environmental sustainability and human rights through research. The index is based on 2007 EPA Toxics Release Inventory data. PERI's Toxic 100 index ranks the nation's largest companies based on the quantity of their emissions, relative toxicity of chemicals emitted, and proximity to population centers, among other criteria."

Quoting CoopAmerica http://www.coopamerica.org/programs/responsibleshopper/http://www.coopamerica.org/programs/responsibleshopper/company.cfm?id=233

"General Motors' Central Foundry Division plant has been placed on the EPA's Superfund National Priority List, a listing of national hazardous waste sites the that EPA has determined pose a significant threat to human health. The GM site, located in St. Lawrence County, NY, contains approximately 850,000 cubic yards of polychlorinated biphenyl (PCB)-contaminated material. The EPA determined that sediment from two nearby rivers, the St. Lawrence and Raquette, have been contaminated with PCBs, as well as soil and sediment on the local St. Regis Mohawk Reservation. The EPA states: "Individuals ingesting or touching contaminated surface water, groundwater, soil, sludges, or sediments potentially are at risk." Because of the local Mohawk Reservation consumption of fish or wildlife from contaminated areas is of special concern and fishing is restricted by the State Health Department and the Indian Reservation Administration."

Quoting CoopAmerica http://www.coopamerica.org/programs/responsibleshopper/http://www.coopamerica.org/programs/responsibleshopper/company.cfm?id=233