Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
DCP MIDSTREAM LP/SHOLEM GAS PLANT
1 MI W THEN 4 MI N OF COUNTY LINE OK, DUNCAN, OK, 73533
Parent company: PHILLIPS 66
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 | Formaldehyde | n-Hexane | Cyclohexane | Methanol | Benzene | Total (lbs) |
| 2024 | — | 5,640 | 1,700 | 660 | 540 | 8,957 |
| 2023 | 18,000 | 4,420 | 3,672 | 519 | 682 | 28,459 |
| 2022 | — | 1,480 | 2,892 | 919 | 632 | 7,022 |
▎ 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.