Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
STATELINE COMPLEX
15071 56TH STREET NW, WILLISTON, ND, 58801
Parent company: ONEOK INC.
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 | Toluene | Benzene | Methanol | Total (lbs) | |
| 2024 | 4,924 | 527 | 100 | 1 | 5,552 | |
| 2023 | 4,852 | — | 14 | — | 4,866 | |
| 2022 | 4,826 | — | 88 | 4 | 4,918 | |
▎ 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.