Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
1199 12TH AVE, HELENA, MT, 59601
Parent company: PHILLIPS 66 CO
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
The 10 chemicals with the highest cumulative on-site releases in pounds (lbs) across all available years.
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 | Methyl tert-butyl ether | Toluene | Benzene | Xylene (mixed isomers) | Total (lbs) |
| 2012 | 235 | — | 728 | 204 | 469 | 1,860 |
| 1999 | 3,053 | 3,040 | 2,546 | 1,839 | 1,133 | 13,109 |
| 1998 | 3,291 | 3,244 | 2,713 | 1,955 | 1,000 | 13,958 |
▎ 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.