The Arizona Silverbelt newspaper reports that "on-site land releases decreased by 8 percent, decreasing more than 7 million pounds." They also note that air releases decreased by 13%, down 591 thousand pounds and water releases increased 638 pounds, up 17% from 2006 data.
The biggest releases are copper and lead, according to EPA:
| Chemical | Total Releases (in pounds) |
|---|---|
| Copper Compounds | 30,307,852 |
| Lead Compounds | 18,963,984 |
| Zinc Compounds | 17,465,267 |
| Barium Compounds | 4,382,896 |
| Barium | 2,363,922 |
| Chromium Compounds (Except Chromite Ore mined in the Transvaal Region) | 2,163,255 |
| Manganese | 1,532,491 |
| Manganese Compounds | 1,440,308 |
| Sulfuric Acid (1994 And After "Acid Aerosols" Only) | 877,821 |
| Hydrogen Fluoride | 829,340 |