Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
THOMPSON STEEL PIPE CO
100 THOMPSON PIPE RD, PRINCETON, KY, 42445
Parent company: NORTHWEST PIPE CO
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 | Xylene (mixed isomers) | Manganese | Toluene | Total (lbs) | ||
| 1995 | — | 19,876 | — | 19,876 | ||
| 1994 | 27,901 | 57,226 | — | 85,127 | ||
| 1993 | 19,130 | 59 | — | 19,189 | ||
| 1992 | 41,000 | 40 | 15,000 | 56,040 | ||
| 1991 | 26,000 | 37 | — | 26,037 | ||
▎ 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.