The EPA released new data this month at http://www.epa.gov/tri/

Click here for the TRI report where the following info was obtained. Go to page 21 of the .pdf for the Top 50 Polluters

Top 7 Most Highly Polluting U.S. Facilities, by Weight in Pounds (2006)

1) Red Dog Operations: Kotzebue, Alaska, 615.3 million
2) Kennecott Utah Copper Mine & Power Plant: Utah 102.5 million
3) Phelps Dodge Miami Inc.: Claypool, Gila County, Ariz. 59.5 million
4) Newmont Mining Corp. Twin Creeks Mine: Golconda, Nev. 56.9 million
5) Envirosafe Service of Ohio: Lucas County, Ohio, 53.3 million
6) Barrick Goldstrike Mine Inc.: Elko, Nev., 48.6 million
7) Kennecott Greens Creek Mining Co.: Juneau, Alaska, 44.5 million

Congratulations Kennecott, you placed twice in the Top 10!!