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Emissions

Allen Fossil Plant

What TVA is doing about emissions at Allen

TVA has taken a number of steps to make the efficient generation of power at Allen as clean as possible:

  • The plant is equipped with electrostatic precipitators that capture ash from the burning coal.
  • The use of low-sulfur coal from the western United States limits emissions of sulfur dioxide.
  • A technology called overfire air limits the production of nitrogen oxides that contribute to the formation of ozone and acid rain. This technology involves modifications that reduce the oxygen available to form nitrogen oxides in the furnaces’ combustion zones.
  • All three coal units at Allen operate selective catalytic reduction systems reducing nitrogen oxide emissions by up to 90 percent.
  • In support of recent environmental agreements and its vision of being one of the nation's leading providers of low-cost and cleaner energy by 2020, TVA will install scrubbers on or retire the Allen coal fired units no later than December 31, 2018.
  • Allen combustion turbines burn low emitting natural gas or ultra-low sulfur fuel oil.

Sulfur dioxide

See raw data for this chart

Year Coal Combustion Turbines*
1974 79408
1975 99727
1976 106568
1977 111432
1978 103189
1979 75602
1980 73989
1981 74620
1982 44935
1983 68640
1984 60853
1985 65717
1986 62143
1987 73712
1988 62774
1989 52561
1990 59704
1991 53844
1992 57614
1993 80216
1994 79250
1995 48274
1996 20332
1997 21323
1998 20211
1999 13681
2000 18862 4
2001 15454 24
2002 18711 6
2003 18785 18
2004 23495 5
2005 23882 4
2006 17413 3
2007 13210 1
2008 12495 1
2009 11871 2
2010 11049 9
2011 10969 5
2012 9609 4
2013 9991 5

Additional historical emission data for combustion turbines will be added when it becomes available.

*Data includes 31 tons from 2000 to 2012 for units that produce less than 25 megawatts and are not required to be reported to the Environmental Protection Agency.

View more information on sulfur dioxide and what TVA is doing about it.

Nitrogen oxides

See raw data for this chart

Year Coal Combustion Turbines*
1974 26058
1975 30992
1976 35907
1977 32416
1978 31612
1979 30644
1980 32855
1981 33834
1982 21357
1983 31643
1984 28082
1985 30148
1986 27139
1987 33386
1988 27491
1989 25141
1990 29580
1991 28078
1992 28406
1993 40305
1994 42277
1995 38673
1996 28967
1997 29193
1998 26389
1999 16215
2000 18708 287
2001 18560 26
2002 14471 44
2003 11515 35
2004 11302 11
2005 12491 12
2006 13265 47
2007 12628 29
2008 8057 7
2009 2603 4
2010 2449 24
2011 2531 33
2012 1807 9
2013 1937 1

Additional historical emission data for combustion turbines will be added when it becomes available.

*Data includes 80 tons from 2000 to 2012 for units that produce less than 25 megawatts and are not required to be reported to the Environmental Protection Agency.

View more information on nitrogen oxides and what TVA is doing about them.

Carbon dioxide

See raw data for this chart

Year Coal Combustion Turbines*
1995 4863072
1996 4341469
1997 5027025
1998 5072807
1999 3469872
2000 5112502 92688
2001 4921528 7032
2002 5366473 13650
2003 5434209 6620
2004 5046074 2205
2005 5337930 2481
2006 5733667 7468
2007 5476954 3188
2008 5359344 554
2009 5210346 380
2010 4981959 2274
2011 4890479 2199
2012 4433339 426
2013 4735258 382

Additional historical emission data for combustion turbines will be added when it becomes available.

*Data includes 141,165 tons from 2000 to 2012 for units that produce less than 25 megawatts and are not required to be reported to the Environmental Protection Agency.

View more information on carbon dioxide and what TVA is doing about it.

Toxics Release Inventory

2012 data

All amounts are in pounds

Chemical Air Water Land Off-Site Disposal Total
Hydrochloric Acid (aerosol) 120,000 0 0 0 120,000
Hydrogen Fluoride 120,000 0 0 0 120,000
Sulfuric Acid (aerosol) 5 0 0 0 5
Ammonia 105,000 92 0 0 105,092
Antimony Compounds          
Arsenic Compounds          
Barium Compounds 10,030 16,000 550,000 560,004 1,136,034
Beryllium Compounds          
Cadmium Compounds          
Chromium Compounds          
Cobalt Compounds          
Copper Compounds 311 2,600 13,000 24,000 39,911
Lead Compounds 250 0 2,200 11,002 13,452
Manganese Compounds 619 0 23,000 21,000 44,619
Mercury Compounds 160 1 9 46 216
Nickel Compounds          
Selenium Compounds          
Silver Compounds          
Thallium Compounds          
Vanadium Compounds 391 2,300 18,000 19,000 39,691
Zinc Compounds 971 2,500 7,700 18,000 29,171
Benzo(g,h,i)perylene 0 0 0 0 0
Naphthalene 28 0 0 0 28
Nitrate Compounds          
Dioxin (grams) 1 0 0 0 1
Polycyclic Aromatic Compounds 14 0 7 1 22
Hydrazine          
Total 357,780 23,493 613,916 653,052 1,648,241

 

Gross MWh Generated: 4,482,160
Pounds Released per MWh: 0.368

Emissions by plant

Allen

Brownsville

Bull Run

Caledonia

Colbert

Cumberland

Gallatin

Gleason

John Sevier

Johnsonville

Kemper

Kingston

Lagoon Creek

Magnolia

Marshall

Paradise

Shawnee

Southaven

Widows Creek

Other sites

 

Emissions by type

Carbon Dioxide

Nitrogen Oxides

Ozone

Sulfur Dioxide

Greenhouse Gases

Toxics Release Inventory (TRI)

           
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