Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
COPPERSTONE MINE
MILE POST 121.5 ARIZONA RT 95, 5 MILES W, QUARTZSITE, AZ, 85346
Parent company: BONANZA EXPLORATIONS INC
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 | Copper compounds | Lead compounds | Total (lbs) | |||
| 2013 | 700,008 | 2,499 | 702,507 | |||
| 2012 | 710,319 | 2,373 | 712,692 | |||
▎ 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.