Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
HOOVER TREATED WOOD PRODUCTS INC
303 DILLARD GARDENS RD, WINSTON, OR, 97496
Parent company: GRAHAM HOLDINGS 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 | Formaldehyde | Arsenic compounds | Copper compounds | Chromium compounds (except for chromite ore mined in the Transvaal Region) | Total (lbs) | |
| 2023 | 426 | — | — | — | 426 | |
| 2022 | 574 | — | — | — | 574 | |
| 2020 | 467 | 12 | 2 | 3 | 485 | |
| 2019 | 474 | 1 | 1 | 2 | 478 | |
| 2018 | 592 | 0 | 0 | 0 | 593 | |
| 2017 | — | 1 | 1 | 0 | 2 | |
| 2016 | — | 3 | 2 | 1 | 6 | |
| 2015 | — | 1 | 5 | 4 | 9 | |
| 2014 | 293 | 1 | 1 | 1 | 294 | |
▎ 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.