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TRI Explorer

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Data Source: 2023 National Analysis Dataset (updated October 2024, released October 2024) See Note     Instructions for printing wide reports




TRI On-site and Off-site Reported Disposed of or Otherwise Released (in pounds), Trend Report for facilities in Colstrip Steam Electric Station (TRI ID 59323MNTNPWILLO) for Chromium compounds (except for chromite ore mined in the Transvaal Region) chemical, U.S. 1998-2023
Are year to year changes comparable?
Row #  Year  Fugitive Air  View Trend Graphic Stack Air  View Trend Graphic Total Air Emissions  View Trend Graphic Surface Water Discharges  View Trend Graphic Underground Injection Class I Wells  View Trend Graphic Underground Injection Class II-V Wells  View Trend Graphic Total Underground Injection  View Trend Graphic RCRA Subtitle C Landfills  View Trend Graphic Other Landfills  View Trend Graphic Total Landfills  View Trend Graphic Land Treatment/Application Farming  View Trend Graphic RCRA Subtitle C Surface Impoundment  View Trend Graphic Other Surface Impoundments  View Trend Graphic Total Surface Impoundments  View Trend Graphic Other Land Disposal  View Trend Graphic Total On-site Releases to Land  View Trend Graphic Total On-site Disposal or Other Releases  View Trend Graphic Off-Site Disposal-Storage Only  View Trend Graphic Off-Site Disposal-Solidification/Stabilization (metals only)  View Trend Graphic Off-Site Disposal-Wastewater Treatment-Metals Only  View Trend Graphic Off-Site Disposal-Underground Injection Class I Wells  View Trend Graphic Off-Site Disposal-Underground Injection Class II-V Wells  View Trend Graphic Total Off-Site Disposal-Underground Injection  View Trend Graphic POTW Transfers - Other Releases  View Trend Graphic Off-Site Disposal-RCRA Subtitle C Landfills  View Trend Graphic Off-Site Disposal-Other Landfills  View Trend Graphic POTW Transfers - Releases to Class I UI Wells and Landfills  View Trend Graphic Off-Site Disposal-RCRA Subtitle C Surface Impoundments  View Trend Graphic Off-Site Disposal-Other Surface Impoundments  View Trend Graphic Total Off-Site Disposal-Surface Impoundments  View Trend Graphic Total Off-Site Disposal-Landfill/Surface Impoundments  View Trend Graphic Off-Site Disposal-Land Treatment  View Trend Graphic Off-Site Disposal-Other Land Disposal  View Trend Graphic Off-Site Disposal-Other Off-site Management  View Trend Graphic Off-Site Disposal-Waste Broker  View Trend Graphic Off-Site Disposal-Unknown  View Trend Graphic Total Off-site Disposal or Other Releases  View Trend Graphic Total On- and Off-site Disposal or Other Releases  View Trend Graphic
 
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1 1998 5 750 755 0 0 0 0 0 68,000 68,000 0 . . 0 0 68,000 68,755 . . . . . . . . . . . . . . . . 250 . . 250 69,005
2 1999 5 750 755 0 0 0 0 0 65,000 65,000 0 . . 0 0 65,000 65,755 . . . . . . . . . . . . . . . . 1,800 . 1 1,801 67,556
3 2000 250 750 1,000 0 0 0 0 0 62,000 62,000 0 . . 0 0 62,000 63,000 . . . . . . . . . . . . . . . . 255 . 5 260 63,260
4 2001 5 750 755 0 0 0 0 0 68,000 68,000 0 . . 0 0 68,000 68,755 . 5 . . . . . . . . . . . . . . 1,550 . . 1,555 70,310
5 2002 10 750 760 0 0 0 0 0 61,960 61,960 0 . . 0 0 61,960 62,720 . . . . . . . . . . . . . . . . 1,970 . . 1,970 64,690
6 2003 10 780 790 0 0 0 0 0 64,680 64,680 0 0 0 0 0 64,680 65,470 . 5 . . . . . . . . . . . . . . 1,240 . . 1,245 66,715
7 2004 10 785 795 0 0 0 0 0 67,460 67,460 0 0 0 0 0 67,460 68,255 . 226 . . . . . . . . . . . . . . 180 . . 406 68,661
8 2005 6 770 776 0 0 0 0 0 69,440 69,440 0 0 0 0 0 69,440 70,216 . . . . . . . . . . . . . . . . 1,940 . . 1,940 72,156
9 2006 5 700 705 0 0 0 0 0 64,500 64,500 0 0 0 0 0 64,500 65,205 . . . . . . . 240 . . . . . 240 . . 660 . . 900 66,105
10 2007 6 740 746 0 0 0 0 0 67,000 67,000 0 0 0 0 0 67,000 67,746 . . . . . . . 0 8 . . . . 8 . . 1,730 . . 1,738 69,484
11 2008 6 760 766 0 0 0 0 0 69,500 69,500 0 0 0 0 0 69,500 70,266 . . . . . . . 0 . . . . . 0 . . 1,020 1 . 1,021 71,287
12 2009 10 500 510 0 0 0 0 0 56,400 56,400 0 0 0 0 0 56,400 56,910 . . . . . . . 8 . . . . . 8 . . 645 . . 653 57,563
13 2010 10 640 650 0 0 0 0 0 97,300 97,300 0 0 0 0 0 97,300 97,950 . . . . . . . 3 . . . . . 3 . . 1,900 2 . 1,905 99,855
14 2011 1 430 431 0 0 0 0 0 78,900 78,900 0 0 0 0 0 78,900 79,331 . . . . . . . 0 . . . . . 0 . . 1,510 1 . 1,511 80,842
15 2012 1 410 411 0 0 0 0 0 76,800 76,800 0 0 0 0 0 76,800 77,211 . . . . . . . 0 . . . . . 0 . . 540 2 . 542 77,753
16 2013 5 420 425 0 0 0 0 0 75,100 75,100 0 0 0 0 0 75,100 75,525 . . . . . . . 0 . . . . . 0 . . 540 27 . 567 76,092
17 2014 5 460 465 0 0 0 0 0 84,500 84,500 0 0 0 0 0 84,500 84,965 . . . . . . . 0 . . . . . 0 . . 400 4 . 404 85,369
18 2015 5 490 495 0 0 0 0 0 91,500 91,500 0 0 0 0 0 91,500 91,995 . . . . . . . 0 3 . . . . 3 . . 630 11 . 644 92,639
19 2016 6 450 456 0 0 0 0 0 100,500 100,500 0 0 0 0 0 100,500 100,956 . . . . . . . . . . . . . . . . 58 8 . 66 101,022
20 2017 6 450 456 0 0 0 0 0 95,500 95,500 0 0 0 0 0 95,500 95,956 . . . . . . . . . . . . . . . . 1,214 8 . 1,222 97,178
21 2018 6 430 436 0 0 0 0 0 89,300 89,300 0 0 0 0 0 89,300 89,736 . . . . . . . . . . . . . . . . 340 5 . 345 90,081
22 2019 6 450 456 0 0 0 0 0 103,100 103,100 0 0 0 0 0 103,100 103,556 . . . . . . . . . . . . . . . . 188 6 . 194 103,750
23 2020 5 270 275 0 0 0 0 0 67,000 67,000 0 0 0 0 0 67,000 67,275 . . . . . . . . . . . . . . . . . 3 . 3 67,278
24 2021 4 330 334 0 0 0 0 0 69,100 69,100 0 0 0 0 0 69,100 69,434 . . . . . . . . . . . . . . . . . 33 . 33 69,467
25 2022 3 430 433 0 0 0 0 0 58,000 58,000 0 0 0 0 0 58,000 58,433 . . . . . . . . . . . . . . . . . 1 . 1 58,434
26 2023 3 430 433 0 0 0 0 0 61,600 61,600 0 0 0 0 0 61,600 62,033 . . . . . . . . 0 . . . . 0 . . . 2 . 2 62,035

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Note: Reporting year (RY) 2023 is the most recent TRI data available. Facilities reporting to TRI were required to submit their data to EPA by July 1 for the previous calendar year's activities. TRI Explorer is using the National Analysis data set (updated October 2024, published October 2024). This dataset includes revisions for the years 1988 to 2023 processed by EPA. Revisions submitted to EPA after this time are not reflected in TRI Explorer reports. TRI data may also be obtained through EPA Envirofacts.

Users of TRI information should be aware that TRI data reflect releases and other waste management activities of chemicals, not whether (or to what degree) the public has been exposed to those chemicals. Release estimates alone are not sufficient to determine exposure or to calculate potential adverse effects on human health and the environment. TRI data, in conjunction with other information, can be used as a starting point in evaluating exposures that may result from releases and other waste management activities which involve toxic chemicals. The determination of potential risk depends upon many factors, including the toxicity of the chemical, the fate of the chemical, and the amount and duration of human or other exposure to the chemical after it is released.

Off-site disposal or other releases show only net off-site disposal or other releases, that is, off-site disposal or other releases transferred to other TRI facilities reporting such transfers as on-site disposal or other releases are not included to avoid double counting.

On-site Disposal or Other Releases include Underground Injection to Class I Wells (Section 5.4.1), RCRA Subtitle C Landfills (5.5.1A), Other Landfills (5.5.1B), Fugitive or Non-point Air Emissions (5.1), Stack or Point Air Emissions (5.2), Surface Water Discharges (5.3), Underground Injection to Class II-V Wells (5.4.2), Land Treatment/Application Farming (5.5.2), RCRA Subtitle C Surface Impoundments (5.5.3A), Other Surface Impoundments (5.5.3B), and Other Land Disposal (5.5.4). Off-site Disposal or Other Releases include from Section 6.2 Class I Underground Injection Wells (M81), Class II-V Underground Injection Wells (M82, M71), RCRA Subtitle C Landfills (M65), Other Landfills (M64, M72), Storage Only (M10), Solidification/Stabilization - Metals and Metal Category Compounds only (M41 or M40), Wastewater Treatment (excluding POTWs) - Metals and Metal Category Compounds only (M62 or M61), RCRA Subtitle C Surface Impoundments (M66), Other Surface Impoundments (M67, M63), Land Treatment (M73), Other Land Disposal (M79), Other Off-site Management (M90), Transfers to Waste Broker - Disposal (M94, M91), and Unknown (M99) and, from Section 6.1 Transfers to POTWs (metals and metal category compounds only).

For purposes of analysis, data reported as Range Code A is calculated using a value of 5 pounds, Range Code B is calculated using a value of 250 pounds and Range Code C is calculated using a value of 750 pounds.

A decimal point, or "." denotes the following: if "NA" is reported across an entire row, the facility submitted a Form A (i.e., the facility certified that its total annual reportable amount is less than 500 pounds, and does not manufacture, process, or otherwise use more than 1 million pounds); or if a decimal point is reported in a single column, the facility left that particular cell blank in its Form R submission (a zero in a cell denotes either that the facility reported "0" or "NA" in its Form R submission). A decimal point is reported in the following columns because the element was not required to be reported for that year (the Form R has been changed over the years to require more detailed reporting for some media): Underground Injection Class I, Underground Injection Class II-V, RCRA Subtitle C Landfills and Other Landfills for the years 1988 to 1995; Off-Site Disposal - RCRA Subtitle C Landfills, Off-Site Disposal - Other Landfills and Off-Site Disposal - Surface Impoundments for the years 1988 to 2001; Other RCRA Subtitle C Surface Impoundments, Other Surface Impoundments, Off-Site Underground Injection Class I Wells, Off-Site Underground Injection Class II-V Wells, Off-Site Disposal - RCRA Subtitle C Surface Impoundments and Off-Site Disposal - Other Surface Impoundments for the years 1988 to 2002.

How to cite TRI Explorer. Following APA Style, 6th edition, an appropriate citation to TRI Explorer is:
United States Environmental Protection Agency. (2024). TRI Explorer (2023 National Analysis Dataset (updated October 2024, released October 2024)) [Internet database]. Retrieved from https://enviro.epa.gov/triexplorer/, (December 08, 2024).

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