Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
SPRINGERVILLE GENERATING STATION
12 MILES N 12 MILES E, SPRINGERVILLE, AZ, 85938
Parent company: UNS ENERGY CORP
Carcinogen
PBT
— 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 | Barium | Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | Manganese | Vanadium (except when contained in an alloy) | Barium And Barium Compounds | Total (lbs) |
| 2024 | — | 1,685,548 | — | — | — | 2,219,778 |
| 2023 | — | 1,659,785 | — | — | — | 2,451,146 |
| 2022 | — | 1,910,216 | — | — | — | 2,731,837 |
| 2021 | — | 1,757,605 | — | — | — | 2,651,134 |
| 2020 | — | 1,912,051 | — | — | — | 2,819,542 |
| 2019 | — | 2,062,352 | — | — | — | 3,006,509 |
| 2018 | — | — | — | — | 2,416,613 | 3,613,531 |
| 2017 | 2,326,200 | — | 350,579 | 135,617 | — | 3,354,961 |
| 2016 | 2,600,507 | — | 411,769 | 151,818 | — | 3,755,425 |
| 2015 | 2,840,928 | — | 399,975 | 160,084 | — | 4,042,235 |
| 2014 | 2,590,342 | — | 436,706 | 158,260 | — | 3,875,979 |
| 2013 | 2,779,894 | — | 481,251 | 173,339 | — | 4,253,226 |
| 2012 | 2,014,596 | — | 411,723 | 166,427 | — | 3,274,558 |
| 2011 | 2,847,659 | — | 488,588 | 157,345 | — | 4,231,272 |
| 2010 | 2,932,596 | — | 360,852 | 167,548 | — | 4,150,144 |
| 2009 | 1,692,911 | — | 307,736 | 114,095 | — | 2,658,394 |
| 2008 | 2,007,387 | — | 456,038 | 149,882 | — | 3,194,773 |
| 2007 | 2,255,027 | — | 494,496 | 164,755 | — | 3,553,538 |
| 2006 | 2,106,009 | — | 461,979 | 157,352 | — | 3,361,041 |
| 2005 | 1,312,508 | — | 492,796 | 142,980 | — | 2,378,751 |
| 2004 | 1,823,597 | — | 438,676 | 217,996 | — | 2,870,442 |
| 2003 | 1,913,329 | — | 457,237 | 228,308 | — | 3,006,803 |
| 2002 | 1,509,150 | — | 400,827 | 257,499 | — | 2,754,149 |
| 2001 | 1,300,413 | — | 460,145 | 210,068 | — | 2,441,499 |
| 2000 | 1,000,455 | — | 330,147 | 290,131 | — | 2,038,539 |
| 1999 | 1,022,067 | — | 329,501 | — | — | 1,767,611 |
| 1998 | 930,872 | — | 301,226 | — | — | 1,628,787 |
▎ 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.