Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
PHILLIPS RESEARCH CENTER
PAWHUSKA RD US HWY 60 W, BARTLESVILLE, OK, 74004
Parent company: PHILLIPS PETROLEUM CO
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 | Propylene | Cyclohexane | Ethylene | 1,3-Butadiene | N-Methyl-2-pyrrolidone | Total (lbs) |
| 2000 | — | 10,677 | 5,267 | — | 2,372 | 18,932 |
| 1999 | — | 15,413 | 11,366 | 199 | 326 | 28,086 |
| 1998 | 5,947 | 62,421 | 8,224 | 10,644 | 33,070 | 136,610 |
| 1997 | 4,927 | 30,069 | 5,833 | 5,601 | 338 | 51,210 |
| 1996 | 6,588 | 13,249 | 6,786 | 4,846 | — | 35,808 |
| 1995 | 17,186 | 35,721 | 11,071 | 4,862 | — | 70,899 |
| 1994 | 49,023 | 11,606 | 16,378 | 3,545 | — | 85,052 |
| 1993 | 72,764 | 28,924 | 22,310 | 1,522 | — | 132,221 |
| 1992 | 41,201 | 16,467 | 46,630 | 267 | — | 108,189 |
| 1991 | 48,089 | 32,098 | 38,610 | 4,238 | — | 128,996 |
| 1990 | 55,157 | 16,729 | 49,024 | 2,642 | — | 128,272 |
| 1989 | 17,754 | 957 | 3,862 | — | — | 25,601 |
| 1988 | 1,635 | — | 2,849 | — | — | 8,930 |
| 1987 | 8,120 | 750 | — | — | — | 8,870 |
▎ 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.