Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
PCC STRUCTURALS
839 POQUONNOCK RD, GROTON, CT, 06340
Parent company: BERKSHIRE HATHAWAY 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 | 1,1,1-Trichloroethane | Dichloromethane | Nickel | Hydrogen fluoride | Copper | Total (lbs) |
| 2024 | — | — | 232 | — | — | 391 |
| 2023 | — | — | 205 | — | — | 341 |
| 2022 | — | — | 205 | — | — | 341 |
| 2021 | — | — | 242 | — | — | 407 |
| 2020 | — | — | 430 | — | — | 609 |
| 2019 | — | — | 603 | — | — | 858 |
| 2018 | — | — | 0 | — | — | 1 |
| 2017 | — | — | 0 | — | — | 1 |
| 2016 | — | — | 0 | — | — | 1 |
| 2015 | — | — | 0 | — | — | 1 |
| 2014 | — | — | 1 | — | — | 2 |
| 2013 | — | — | 1 | — | — | 2 |
| 2012 | — | — | 1 | — | — | 2 |
| 2011 | — | — | 1 | — | — | 2 |
| 2010 | — | — | 1 | — | — | 1 |
| 2009 | — | — | 170 | — | — | 273 |
| 1998 | — | — | — | 500 | — | 500 |
| 1997 | — | — | — | 1,500 | — | 1,500 |
| 1996 | — | 7,650 | — | 500 | — | 8,150 |
| 1995 | — | 500 | 255 | 255 | 255 | 2,540 |
| 1994 | 500 | 500 | 1,000 | 500 | 500 | 4,500 |
| 1993 | 25,000 | — | — | 500 | 1,000 | 28,000 |
| 1992 | 114,641 | 49,560 | 255 | — | 1,000 | 168,155 |
| 1991 | 116,043 | 54,260 | 1,000 | — | 255 | 172,340 |
| 1990 | 90,545 | 44,571 | 500 | — | 10 | 135,646 |
| 1989 | 113,100 | 19,690 | 500 | — | 500 | 134,790 |
| 1988 | 104,000 | — | — | — | — | 105,000 |
▎ 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.