Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
MGE WEST CAMPUS COGENERATION FACILITY
515 WALNUT ST, MADISON, WI, 53726
Parent company: MGE ENERGY
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 | Ammonia | 1,2,4-Trimethylbenzene | Xylene (mixed isomers) | Naphthalene | Total (lbs) | |
| 2024 | 41,855 | — | — | — | 41,855 | |
| 2023 | 35,009 | — | — | — | 35,009 | |
| 2022 | 39,079 | — | — | — | 39,079 | |
| 2021 | 32,613 | — | — | — | 32,613 | |
| 2020 | 52,784 | — | — | — | 52,784 | |
| 2019 | 37,095 | — | — | 10 | 37,106 | |
| 2018 | 31,529 | — | — | — | 31,529 | |
| 2017 | 30,668 | — | — | — | 30,668 | |
| 2016 | 47,412 | — | — | — | 47,412 | |
| 2015 | 20,205 | — | — | — | 20,205 | |
| 2014 | 8,131 | — | — | 16 | 8,146 | |
| 2013 | 10,575 | — | — | — | 10,575 | |
| 2012 | 12,706 | — | — | — | 12,706 | |
| 2011 | 9,181 | — | — | — | 9,181 | |
| 2010 | 14,543 | — | — | — | 14,543 | |
| 2009 | 9,626 | — | — | — | 9,626 | |
| 2008 | 18,086 | — | — | — | 18,086 | |
| 2007 | 21,205 | — | — | — | 21,205 | |
| 2006 | 18,005 | — | — | — | 18,005 | |
| 2005 | 18,705 | 43 | 32 | — | 18,780 | |
▎ 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.