Year-over-year total releases
Reported on-site TRI releases in pounds, grouped by reporting year.
Facility detail
BLACK HILLS ENERGY - WN CLARK STAT ION
550 HWY 50 W, CANON CITY, CO, 81212
Parent company: BLACK HILLS CORP
PBT
— EPA classifications across all reporting years
Top chemical totals
The 10 chemicals with the highest cumulative on-site releases 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.
| Year | Hydrogen fluoride | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | Lead compounds | Mercury compounds | Total |
|---|---|---|---|---|---|---|
| 2012 | 30,962 | 13,442 | 1,302 | 30 | 6 | 45,742 |
| 2011 | 36,416 | 15,809 | 1,531 | 34 | 8 | 53,798 |
| 2010 | 35,512 | 15,417 | 1,494 | 34 | 7 | 52,464 |
| 2009 | 35,400 | 15,368 | 1,488 | 33 | 7 | 52,296 |
| 2008 | 37,069 | 16,093 | 1,559 | 35 | 8 | 54,764 |
| 2007 | 34,227 | 13,373 | 1,439 | 33 | 7 | 49,079 |
| 2006 | 31,435 | 27,617 | 1,504 | 28 | 1 | 60,585 |
| 2005 | 31,978 | 16,783 | 1,524 | 31 | 3 | 50,319 |
| 2004 | 31,986 | 16,650 | 1,486 | 31 | 3 | 50,156 |
| 2003 | 32,273 | 31,135 | 1,241 | 35 | 2 | 64,686 |
| 2002 | 28,140 | — | 109 | 2 | 3 | 28,254 |
| 2001 | 26,150 | — | 80 | 2 | 2 | 26,234 |
| 2000 | 28,047 | — | 107 | — | 2 | 28,156 |
| 1999 | — | — | 75 | — | — | 75 |
| 1998 | — | — | 72 | — | — | 72 |