Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
50 BUTTES
3669 SOUTH HWY 50, GILLETTE, WY, 82718
Parent company: WESTERN MIDSTREAM PARTNERS LP
Carcinogen
— 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 | n-Hexane | Ethylene glycol | Toluene | Cyclohexane | Benzene | Total (lbs) |
| 2024 | 4,010 | — | 338 | 660 | — | 5,152 |
| 2023 | 3,032 | 844 | 364 | — | 447 | 4,843 |
▎ 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.