Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
ASARCO INC LEADVILLE UNIT BLACK CLOUD MINE
748 COUNTY RD 2A, LEADVILLE, CO, 80461
Parent company: ASARCO INC
Carcinogen
PBT
— EPA classifications across all reporting years
Top chemical totals
The 10 chemicals with the highest cumulative on-site releases in pounds (lbs) across all available years.
Full release table
Rows are years. Columns show the five highest-total chemicals across all years plus each year's total release volume.
| All values in pounds (lbs) | ||||||
|---|---|---|---|---|---|---|
| Year | Zinc compounds | Lead compounds | Copper compounds | Cadmium compounds | Cyanide compounds | Total (lbs) |
| 1999 | 132,100 | 98,632 | 9,311 | — | — | 240,044 |
| 1998 | 5,620,814 | 798,676 | 159,802 | 14,783 | 2,009 | 6,596,087 |
▎ Facilities report to EPA's TRI once they manufacture, process, or use a listed chemical above set thresholds. Once that threshold is crossed, they must report actual releases regardless of size — so a small number reflects genuine low-level discharge, not a data error.