Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
TWIN STATE INC
1455 140TH ST, HAMPTON, IA, 50441
Parent company: TWIN STATE INC
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 | Ammonia | Phosphoric acid | Zinc compounds | Total (lbs) | ||
| 2024 | 11,490 | — | — | 11,490 | ||
| 2023 | 12,405 | — | — | 12,405 | ||
| 2022 | 9,825 | — | — | 9,825 | ||
| 2021 | 10,755 | — | — | 10,755 | ||
| 2020 | 7,635 | — | — | 7,635 | ||
| 2019 | 9,435 | — | — | 9,435 | ||
| 2018 | 8,805 | — | — | 8,805 | ||
| 2017 | 9,030 | — | — | 9,030 | ||
| 2016 | 7,695 | — | — | 7,695 | ||
| 2015 | 10,350 | — | — | 10,350 | ||
| 2014 | 7,965 | — | 17 | 7,982 | ||
| 2013 | 12,000 | — | 17 | 12,017 | ||
| 2012 | 14,400 | — | — | 14,400 | ||
| 2011 | 11,250 | — | — | 11,250 | ||
| 2010 | 11,700 | — | — | 11,700 | ||
| 2009 | 9,150 | — | — | 9,150 | ||
| 2008 | 9,705 | — | — | 9,705 | ||
| 2007 | 11,595 | — | — | 11,595 | ||
| 2006 | 8,970 | — | — | 8,970 | ||
| 2005 | 8,865 | — | — | 8,865 | ||
| 2004 | 7,815 | — | — | 7,815 | ||
| 2003 | 8,550 | — | — | 8,550 | ||
| 2002 | 6,240 | — | — | 6,240 | ||
| 2000 | 5,250 | — | — | 5,250 | ||
| 1999 | 150 | — | — | 150 | ||
| 1998 | 4,880 | — | — | 4,880 | ||
| 1997 | 4,800 | — | — | 4,800 | ||
| 1996 | 150 | 100 | — | 250 | ||
| 1995 | 150 | 100 | — | 250 | ||
| 1994 | 150 | 100 | — | 250 | ||
| 1993 | 150 | 100 | — | 250 | ||
▎ 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.