Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
MCLAUGHLIN MINE
26775 MORGAN VALLEY RD, LOWER LAKE, CA, 95457
Parent company: HOMESTAKE MINING CO OF CA
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 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | Nickel compounds | Arsenic compounds | Zinc compounds | Cyanide compounds | Total (lbs) |
| 2002 | 260,310 | 560,000 | — | — | 1,200,000 | 2,445,026 |
| 2001 | 520,540 | 400,000 | — | — | 57,000 | 1,358,042 |
| 2000 | 520,530 | 400,001 | 940,000 | 530,000 | 79,000 | 2,591,453 |
| 1999 | 657,176 | — | 1,065,537 | 530,225 | 104,585 | 2,795,632 |
| 1998 | 870,957 | 698,942 | — | 533,797 | 100,925 | 3,934,947 |
▎ 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.