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   Owner

   Ownership Type
Generation (MWhs) Emissions in Tons Emission Rates (lbs/MWh)
All Sources Fossil Fuel Plants Coal Plants
    Total Fossil Fuel Coal SO2 NOx CO2 Hg SO2 NOx CO2 SO2 NOx CO2 SO2 NOx CO2 Hg*
  Southern   investor-owned corp. 197,975,260 163,641,595 113,595,443 392,049 113,216 144,822,053 2.06 3.96 1.1 1,463.0 4.8 1.4 1,770.0 6.9 1.9 2,163.5 0.04
  AEP   investor-owned corp. 174,093,447 156,734,901 142,288,545 498,009 129,951 154,858,540 3.06 5.72 1.5 1,779.0 6.4 1.7 1,976.1 7.0 1.6 2,055.7 0.04
  NextEra Energy   investor-owned corp. 165,672,221 100,478,445 6,241,523 36,944 25,921 50,743,519 0.03 0.45 0.3 612.6 0.7 0.5 1,010.0 4.9 1.5 2,178.6 0.01
  Duke   investor-owned corp. 156,115,602 107,098,636 93,574,343 238,181 75,193 100,165,488 0.69 3.05 1.0 1,283.2 4.4 1.4 1,870.3 5.1 1.6 2,004.7 0.01
  Exelon   investor-owned corp. 152,698,385 9,130,317 7,386,982 16,911 10,697 9,520,088 0.11 0.22 0.1 124.7 3.7 2.3 2,085.4 4.5 2.7 2,240.8 0.03
  Tennessee Valley Authority   federal power authority 143,854,084 79,135,692 75,976,301 220,238 71,591 84,090,517 0.92 3.06 1.0 1,169.1 5.6 1.8 2,125.2 5.8 1.9 2,173.0 0.02
  Entergy   investor-owned corp. 126,532,342 44,243,747 16,029,227 46,123 47,005 35,515,694 0.43 0.73 0.7 561.4 2.1 2.1 1,605.5 5.6 2.5 2,174.6 0.05
  Dominion   investor-owned corp. 110,223,068 62,207,843 44,559,614 143,290 58,205 56,018,259 0.53 2.60 1.1 1,016.5 4.6 1.9 1,801.0 6.3 2.4 2,136.1 0.02
  Progress Energy   investor-owned corp. 94,901,844 72,670,041 42,568,640 127,600 43,175 60,338,675 0.49 2.69 0.9 1,271.6 3.5 1.2 1,660.6 5.6 1.7 2,126.5 0.02
  MidAmerican   privately held corp. 91,537,297 76,355,734 66,617,400 119,078 93,780 78,769,235 1.02 2.60 2.0 1,721.0 3.1 2.5 2,063.2 3.6 2.8 2,237.0 0.03
  PPL   investor-owned corp. 91,035,830 69,473,321 64,463,560 161,641 69,042 70,351,286 0.91 3.55 1.5 1,545.6 4.7 2.0 2,025.3 5.0 2.1 2,096.4 0.03
  Calpine   investor-owned corp. 89,666,690 83,119,556 -- 237 6,307 36,134,130 -- 0.005 0.1 806.0 0.006 0.2 863.4 -- -- -- --
  Edison International   investor-owned corp. 82,735,676 58,871,275 45,735,647 193,223 53,175 56,059,669 0.60 4.67 1.3 1,355.2 6.6 1.8 1,898.9 8.4 2.3 2,226.9 0.03
  Ameren   investor-owned corp. 76,537,705 65,394,136 64,462,704 215,673 41,254 71,387,737 1.90 5.64 1.1 1,865.4 6.6 1.3 2,183.3 6.7 1.3 2,197.6 0.06
  Xcel   investor-owned corp. 76,180,783 60,882,827 46,205,184 95,565 62,494 60,180,349 0.78 2.51 1.6 1,579.9 3.1 2.0 1,976.9 4.1 2.5 2,263.4 0.03
  FirstEnergy   investor-owned corp. 75,278,215 44,479,848 43,210,420 130,269 43,143 47,215,028 0.58 3.46 1.1 1,254.4 5.9 1.9 2,123.0 5.9 1.9 2,121.9 0.03
  NRG   investor-owned corp. 74,402,363 63,773,649 48,506,424 132,985 39,817 62,694,387 1.47 3.57 1.1 1,685.3 4.2 1.2 1,962.0 5.4 1.5 2,239.3 0.06
  Energy Future Holdings   privately held corp. 73,201,654 52,993,187 50,571,758 215,942 41,019 63,934,954 3.20 5.90 1.1 1,746.8 8.1 1.5 2,412.9 8.5 1.5 2,464.4 0.13
  PSEG   investor-owned corp. 65,088,391 35,420,408 10,676,988 23,924 14,536 23,230,439 0.09 0.74 0.4 713.8 1.4 0.8 1,309.5 4.1 1.8 2,170.8 0.02
  US Corps of Engineers   federal power authority 64,437,340 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  DTE Energy   investor-owned corp. 48,784,339 40,458,564 39,542,241 142,716 44,067 43,251,831 0.76 5.85 1.8 1,773.2 7.1 2.2 2,137.8 7.2 2.2 2,156.2 0.04
  AES   investor-owned corp. 44,443,039 41,810,825 30,695,902 98,757 28,651 39,556,486 0.52 4.44 1.3 1,780.1 4.7 1.4 1,891.7 6.3 1.8 2,174.8 0.03
  US Bureau of Reclamation   federal power authority 41,249,946 3,992,391 3,984,675 1,239 5,936 4,325,007 0.07 0.06 0.3 209.7 0.6 3.0 2,166.6 .6 3.0 2,170.8 0.03
  GenOn   investor-owned corp. 41,225,906 41,225,906 33,393,344 168,804 41,226 39,643,010 0.75 8.19 2.0 1,923.2 8.2 2.0 1,923.2 10.1 2.4 2,105.8 0.04
  Allegheny Energy   investor-owned corp. 41,016,149 40,828,799 39,717,075 66,474 57,496 42,314,163 0.71 3.24 2.8 2,063.3 3.3 2.8 2,072.8 3.3 2.9 2,105.2 0.04
  Dynegy   investor-owned corp. 38,585,118 38,585,118 23,943,363 56,166 12,811 32,435,730 0.16 2.91 0.7 1,681.3 2.9 0.7 1,681.3 4.7 1.0 2,167.1 0.01
  Constellation   investor-owned corp. 35,215,166 18,468,329 13,845,960 26,034 11,898 17,177,582 0.08 1.48 0.7 975.6 2.8 1.3 1,858.8 3.7 1.6 2,135.3 0.01
  PG&E   investor-owned corp. 32,473,598 3,641,357 -- 42 889 1,816,152 0.00 0.003 0.1 111.9 0.02 0.5 997.5 -- -- -- --
  Westar   investor-owned corp. 28,397,238 23,453,004 21,443,866 18,960 29,346 26,349,988 0.45 1.34 2.1 1,855.8 1.6 2.5 2,247.0 1.8 2.6 2,338.5 0.04
  Santee Cooper   state power authority 27,886,857 24,709,243 21,705,762 30,084 12,702 24,565,016 0.10 2.16 0.9 1,761.8 2.4 1.0 1,986.4 2.8 1.1 2,131.6 0.01
  Pinnacle West   investor-owned corp. 26,848,283 17,762,844 12,168,425 9,114 24,516 15,767,362 0.22 0.68 1.8 1,174.6 1.0 2.8 1,775.3 1.5 3.9 2,183.5 0.04
  Great Plains Energy   investor-owned corp. 26,326,738 21,441,261 20,873,403 38,848 20,125 24,411,581 0.33 2.95 1.5 1,854.5 3.6 1.9 2,277.1 3.7 1.9 2,304.9 0.03
  SCANA   investor-owned corp. 26,050,460 19,831,068 13,572,873 48,482 10,786 16,588,082 0.12 3.72 0.8 1,273.5 4.9 1.1 1,672.9 7.1 1.5 2,045.2 0.02
  Salt River Project   power district 25,835,413 19,958,947 16,455,167 16,756 27,548 20,136,334 0.36 1.30 2.1 1,558.8 1.7 2.8 2,017.8 2.0 3.3 2,254.5 0.04
  OGE   investor-owned corp. 25,184,002 24,479,047 14,098,645 41,165 30,838 21,485,333 0.21 3.27 2.4 1,706.3 3.4 2.5 1,755.4 5.8 3.5 2,188.9 0.03
  New York Power Authority   state power authority 24,775,602 4,395,321 -- 16 211 2,111,355 -- 0.001 0.0 170.4 0.007 0.1 960.7 -- -- -- --
  San Antonio City   municipality 22,525,164 14,074,452 12,143,775 22,507 9,133 15,743,546 0.27 2.00 0.8 1,397.9 3.2 1.3 2,237.2 3.7 1.3 2,321.1 0.04
  CMS Energy   investor-owned corp. 22,185,926 20,988,407 17,895,923 74,042 20,636 21,141,887 0.23 6.67 1.9 1,905.9 7.0 1.9 1,976.0 8.2 2.1 2,179.4 0.03
  Oglethorpe   cooperative 21,983,607 11,929,997 9,630,623 21,669 6,164 11,584,918 0.05 1.97 0.6 1,054.0 3.6 1.0 1,942.1 4.5 1.2 2,154.2 0.01
  NV Energy   investor-owned corp. 20,526,715 20,526,715 5,157,891 4,616 9,214 12,483,079 0.08 0.45 0.9 1,216.3 0.4 0.9 1,216.3 1.8 3.1 2,277.9 0.03
  Wisconsin Energy   investor-owned corp. 20,484,492 19,853,208 17,029,643 28,472 14,874 23,127,460 0.18 2.78 1.5 2,258.0 2.9 1.5 2,329.8 3.3 1.7 2,563.0 0.02
  TECO   investor-owned corp. 19,049,262 19,049,262 10,561,350 9,639 5,340 16,513,642 0.05 1.01 0.6 1,733.8 1.0 0.6 1,733.8 1.8 .9 2,400.4 0.01
  Rockland Capital   privately held corp. 18,577,790 18,577,790 573,436 1,978 2,187 7,746,953 0.00 0.21 0.2 834.0 0.2 0.2 834.0 6.5 4.6 2,282.3 0.02
  Associated Electric Coop   cooperative 18,027,712 18,027,712 14,895,437 32,115 11,583 17,382,138 0.22 3.56 1.3 1,928.4 3.6 1.3 1,928.4 4.3 1.5 2,138.8 0.03
  EDF   foreign-owned corp. 17,885,102 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  Alliant Energy   investor-owned corp. 17,738,549 16,897,653 15,920,868 71,821 19,942 19,420,118 0.46 8.10 2.2 2,189.6 8.5 2.4 2,298.1 9.0 2.5 2,347.9 0.06
  NE Public Power District   power district 17,510,123 10,425,817 10,311,788 33,501 19,022 11,883,373 0.14 3.83 2.2 1,357.3 6.4 3.6 2,279.6 6.5 3.7 2,293.6 0.03
  Sempra   investor-owned corp. 17,015,869 13,960,937 -- 30 449 6,045,003 -- 0.004 0.1 710.5 0.004 0.1 866.0 -- -- -- --
  General Electric   investor-owned corp. 16,841,948 16,367,258 20,363 62 1,802 7,193,160 0.00 0.007 0.2 854.2 0.008 0.2 875.9 1.1 .9 2,140.9 0.00
  Basin Electric Power Coop   cooperative 15,992,224 15,601,788 15,509,872 64,826 26,442 18,597,404 0.42 8.11 3.3 2,325.8 8.3 3.4 2,384.0 8.4 3.4 2,393.5 0.05
  Omaha Public Power District   power district 15,870,079 11,555,128 11,405,698 24,811 15,638 12,646,302 0.35 3.13 2.0 1,593.7 4.3 2.7 2,188.9 4.4 2.7 2,204.4 0.06
  DPL   investor-owned corp. 15,734,400 15,734,400 15,513,247 36,996 13,065 16,234,026 0.10 4.70 1.7 2,063.5 4.7 1.7 2,063.5 4.8 1.7 2,074.1 0.01
  International Power   foreign-owned corp. 15,719,213 15,682,827 4,471,852 17,640 3,760 9,777,124 0.11 2.24 0.5 1,244.0 2.2 0.5 1,243.6 7.9 1.4 2,040.3 0.05
  NiSource   investor-owned corp. 15,534,598 15,484,704 13,847,819 45,960 13,620 17,618,962 0.34 5.92 1.8 2,268.4 5.9 1.8 2,275.7 6.6 1.9 2,443.7 0.05
  US Power Generating Company   privately held corp. 15,511,947 15,511,947 -- 253 1,793 7,217,582 -- 0.03 0.2 930.6 0.03 0.2 930.6 -- -- -- --
  JEA   municipality 15,433,685 15,430,793 9,036,871 15,786 8,883 15,013,729 0.05 2.05 1.2 1,945.6 2.0 1.2 1,945.5 2.7 1.4 2,177.3 0.01
  SUEZ Energy   foreign-owned corp. 15,027,994 13,919,073 1,088,595 1,464 2,729 6,367,537 0.01 0.19 0.4 847.4 0.2 0.4 914.9 2.6 1.7 2,293.8 0.01
  IDACORP   investor-owned corp. 14,363,485 6,946,895 6,776,915 9,272 9,120 7,471,783 0.12 1.29 1.3 1,040.4 2.7 2.6 2,151.1 2.7 2.7 2,176.3 0.03
  Occidental   investor-owned corp. 14,059,028 13,977,290 -- 10 661 6,430,663 -- 0.001 0.1 914.8 0.001 0.1 912.6 -- -- -- --
  Los Angeles City   municipality 13,623,435 10,542,238 3,476,342 1,105 5,385 7,355,446 0.06 0.16 0.8 1,079.8 0.2 1.0 1,395.4 .6 3.0 2,170.8 0.03
  PNM Resources   investor-owned corp. 13,438,103 10,255,709 7,187,284 5,744 11,989 9,819,574 0.10 0.85 1.8 1,461.5 1.1 2.3 1,914.9 1.6 3.2 2,258.2 0.03
  Tri-State   cooperative 13,421,898 13,421,898 13,365,697 8,017 18,142 15,393,380 0.10 1.19 2.7 2,293.8 1.2 2.7 2,293.8 1.2 2.7 2,290.0 0.01
  Tenaska   privately held corp. 13,086,568 13,020,058 -- 30 876 5,761,265 -- 0.005 0.1 880.5 0.005 0.1 885.0 -- -- -- --
  Intermountain Power Agency   power district 13,079,502 13,079,502 13,069,438 5,000 26,152 13,080,935 0.10 0.76 4.0 2,000.2 0.8 4.0 2,000.2 .8 4.0 2,001.8 0.02
  Municipal Elec. Auth. of GA   municipality 12,817,929 5,905,775 4,847,414 10,906 3,017 5,679,849 0.02 1.70 0.5 886.2 3.7 1.0 1,923.5 4.5 1.2 2,154.2 0.01
  Dow Chemical   investor-owned corp. 12,664,586 12,007,931 -- 13 419 5,379,890 -- 0.002 0.1 849.6 0.002 0.1 836.5 -- -- -- --
  Energy Capital Partners   privately held corp. 12,479,671 12,479,671 -- 28 443 5,394,832 -- 0.004 0.1 864.6 0.004 0.1 864.6 -- -- -- --
  NC Public Power   municipality 12,371,316 1,400,455 1,387,825 1,324 573 1,460,040 0.01 0.21 0.1 236.0 1.9 0.8 2,085.1 1.9 .8 2,086.6 0.01
  East Kentucky Power Coop   cooperative 12,283,755 12,194,607 11,758,035 31,980 9,699 13,075,405 0.12 5.21 1.6 2,128.9 5.2 1.6 2,144.5 5.4 1.6 2,167.4 0.02
  Lower CO River Authority   state power authority 11,946,974 11,765,633 7,034,112 17,133 5,014 10,324,842 0.11 2.87 0.8 1,728.4 2.9 0.9 1,755.1 4.9 1.2 2,233.5 0.03
  Seminole Electric Coop   cooperative 11,749,493 11,749,491 8,898,763 16,972 2,844 10,723,098 0.05 2.89 0.5 1,825.3 2.9 0.5 1,825.3 3.8 .5 2,105.2 0.01
  Exxon Mobil   investor-owned corp. 11,600,728 10,706,069 -- 11 415 4,235,129 -- 0.002 0.1 730.1 0.002 0.1 727.4 -- -- -- --
  Portland General Electric   investor-owned corp. 11,506,509 9,363,672 4,901,287 12,387 8,682 7,273,995 0.08 2.15 1.5 1,264.3 2.6 1.9 1,553.7 5.0 3.4 2,192.2 0.03
  Arkansas Electric Coop   cooperative 11,421,821 10,698,225 9,785,912 24,355 13,649 10,926,950 0.24 4.26 2.4 1,913.3 4.6 2.6 2,042.8 5.0 2.7 2,132.6 0.05
  Integrys   investor-owned corp. 11,325,461 10,557,392 10,416,048 25,880 8,213 11,815,154 0.22 4.57 1.5 2,086.5 4.9 1.5 2,221.5 4.9 1.6 2,235.9 0.04
  Puget Holdings   privately held corp. 11,168,761 9,239,667 5,326,706 5,282 6,392 7,938,748 0.02 0.95 1.1 1,421.6 1.1 1.4 1,718.4 2.0 2.3 2,312.6 0.01
  Iberdrola   foreign-owned corp. 11,078,069 1,012,214 -- 2 54 411,648 -- 0.000 0.01 74.3 0.004 0.1 813.4 -- -- -- --
  TransAlta   foreign-owned corp. 10,442,647 9,087,203 8,486,571 2,616 11,668 10,943,991 0.17 0.50 2.2 2,096.0 0.6 2.6 2,408.7 .6 2.7 2,508.3 0.04
  Great River Energy   cooperative 10,389,302 10,318,389 10,046,554 20,565 10,709 11,793,077 0.42 3.96 2.1 2,270.2 4.0 2.1 2,285.8 4.1 2.1 2,304.9 0.08
  Austin Energy   municipality 10,372,953 6,992,668 4,024,167 9,810 3,262 6,102,200 0.07 1.89 0.6 1,176.6 2.8 0.9 1,745.3 4.9 1.2 2,233.5 0.03
  UniSource   investor-owned corp. 9,803,050 9,797,180 8,586,353 6,105 11,062 10,277,860 0.09 1.25 2.3 2,096.9 1.2 2.3 2,098.1 1.4 2.5 2,267.2 0.02
  Big Rivers Electric   cooperative 9,748,681 9,748,681 7,630,297 21,900 11,196 11,506,109 0.10 4.49 2.3 2,360.5 4.5 2.3 2,360.5 5.7 2.9 2,340.6 0.03
  ALLETE   investor-owned corp. 9,722,195 8,893,561 8,878,488 19,717 12,761 10,814,771 0.22 4.06 2.6 2,224.8 4.3 2.7 2,432.0 4.3 2.7 2,433.7 0.05
  BP   foreign-owned corp. 9,570,182 6,738,636 -- 100 455 2,635,792 -- 0.02 0.1 550.8 0.03 0.1 702.6 -- -- -- --
  Buckeye Power   cooperative 9,458,753 9,458,753 9,377,687 54,029 3,925 9,516,987 0.20 11.42 0.8 2,012.3 11.4 0.8 2,012.3 11.5 .8 2,022.1 0.04
  Energy Northwest   municipality 9,357,564 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  CLECO   investor-owned corp. 9,344,937 9,344,937 3,308,150 29,125 6,347 8,338,538 0.08 6.23 1.4 1,784.6 6.2 1.4 1,784.6 8.0 1.9 2,333.0 0.05
  El Paso Electric   investor-owned corp. 8,521,949 3,591,561 699,332 567 4,656 2,608,968 0.01 0.13 1.1 612.3 0.3 2.6 1,452.8 1.6 5.6 2,078.1 0.03
  Hoosier Energy   cooperative 8,504,209 8,487,283 8,087,136 33,249 5,930 8,711,275 0.09 7.82 1.4 2,048.7 7.8 1.4 2,052.8 8.2 1.5 2,105.6 0.02
  ArcLight Capital   privately held corp. 8,353,882 8,222,732 -- 15 381 3,690,297 -- 0.004 0.1 883.5 0.004 0.1 897.6 -- -- -- --
  PUD No 2 of Grant County   power district 8,221,855 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  Grand River Dam Authority   state power authority 7,785,928 6,981,697 5,029,411 13,488 11,083 7,212,342 0.27 3.46 2.8 1,852.7 3.9 3.2 2,066.1 5.4 4.4 2,516.7 0.11
  LS Power   privately held corp. 7,729,992 7,729,992 920,557 760 874 4,237,488 0.05 0.20 0.2 1,096.4 0.2 0.2 1,096.4 1.6 .9 2,648.8 0.11
  Chevron   investor-owned corp. 7,661,301 7,435,347 -- 5 70 2,510,624 -- 0.001 0.0 655.4 0.001 0.0 665.9 -- -- -- --
  PUD No 1 of Chelan County   power district 7,654,238 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  International Paper   investor-owned corp. 7,453,728 1,464,201 -- -- 495 1,068,889 -- -- 0.1 286.8 -- 0.7 1,456.6 -- -- -- --
  Sacramento Municipal Util Dist   municipality 7,290,595 5,130,104 -- 11 126 2,269,854 -- 0.003 0.0 622.7 0.004 0.0 884.9 -- -- -- --
  Avista   investor-owned corp. 7,158,278 3,352,835 1,664,328 1,641 1,952 2,617,975 0.01 0.46 0.5 731.5 1.0 1.2 1,561.6 2.0 2.3 2,312.6 0.01
  PowerSouth Energy Coop   cooperative 7,008,925 6,987,394 4,004,502 7,721 6,703 6,129,360 0.04 2.20 1.9 1,749.0 2.2 1.9 1,754.4 3.9 3.2 2,381.1 0.02
  TransCanada   foreign-owned corp. 6,905,947 5,154,112 -- 264 1,306 2,937,109 -- 0.08 0.4 850.6 0.1 0.5 1,139.7 -- -- -- --
 
Total (in thousands)   3,539,528 2,455,946 1,662,102 4,677 1,842 2,197,551 0.03 -- -- -- -- -- -- -- -- -- --
Average (mean)   35,395,276 24,559,464 16,621,018 46,769 18,415 21,975,511 0.30 2.5 1.1 1,366 3.0 1.4 1,721 4.6 2.2 2,224 0.03
Median   15,931,151 13,250,700 8,888,625 17,053 10,198 11,545,514 0.10 2.1 1.1 1,398 2.8 1.4 1,899 4.6 2.0 2,186 0.03
* Mercury emissions rate is in pounds per gigawatt hour (lbs/GWh).  Mercury emissions data is for coal plants only.
All averages are weighted averages based on the total generation and emissions associated with each category.
See the "Benchmarking Air Emissions of the 100 Largest Electric Power Producers in the United States" (2012) for
a discussion of the methodology.

 
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