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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*
    Big Rivers Electric     cooperative 9,696,279 6,987,460 6,956,675 20,041 16,957 11,676,080 0.12 4.1 3.5 2,408.4 5.7 4.9 2,366.4 5.8 4.9 2,371.4 0.03
    NiSource     investor-owned corp. 14,998,320 14,947,625 14,713,029 58,573 30,999 18,056,904 0.37 7.8 4.1 2,407.9 7.8 4.1 2,416.0 8.0 4.2 2,443.9 0.05
    Basin Electric Power Coop     cooperative 16,235,187 16,222,853 16,080,520 66,775 32,634 19,344,917 0.56 8.2 4.0 2,383.1 8.2 4.0 2,384.9 8.3 4.0 2,397.7 0.07
    Vectren     investor-owned corp. 6,849,210 6,849,210 6,739,170 28,219 10,349 7,927,460 0.17 8.2 3.0 2,314.9 8.2 3.0 2,314.9 8.4 3.0 2,345.0 0.05
    Alliant Energy     investor-owned corp. 18,500,821 17,895,860 16,818,410 75,686 24,766 21,237,784 0.65 8.2 2.7 2,295.9 8.5 2.8 2,329.8 9.0 2.9 2,414.1 0.08
    Great River Energy     cooperative 10,129,465 9,975,367 9,713,589 26,017 11,636 11,496,820 0.43 5.1 2.3 2,270.0 5.2 2.3 2,305.0 5.4 2.4 2,328.4 0.09
    Tri-State     cooperative 13,800,014 13,800,014 13,649,367 9,529 20,657 15,630,180 0.18 1.4 3.0 2,265.2 1.4 3.0 2,265.2 1.4 3.0 2,276.7 0.03
    ALLETE     investor-owned corp. 11,218,259 10,510,826 10,473,521 36,258 23,928 12,423,820 0.27 6.5 4.3 2,214.9 6.8 4.4 2,364.0 6.8 4.4 2,369.6 0.05
    Wisconsin Energy     investor-owned corp. 21,247,743 20,589,101 18,664,481 37,366 19,236 23,426,322 0.47 3.5 1.8 2,205.1 3.6 1.9 2,275.6 4.0 2.0 2,412.8 0.05
    Integrys     investor-owned corp. 9,606,374 9,220,494 8,959,708 28,135 13,957 10,491,221 0.30 5.9 2.9 2,184.2 6.1 3.0 2,275.6 6.3 3.1 2,305.8 0.07
    Dairyland Power Coop     cooperative 6,701,869 6,643,804 6,628,990 32,366 11,120 7,314,830 0.05 9.7 3.3 2,182.9 9.7 3.3 2,202.0 9.8 3.4 2,205.6 0.01
    Hoosier Energy     cooperative 8,265,236 8,248,346 8,191,571 39,881 10,657 8,869,910 0.13 9.7 2.6 2,146.3 9.7 2.6 2,150.7 9.7 2.6 2,159.3 0.03
    UniSource     investor-owned corp. 11,904,851 11,898,102 10,734,544 10,105 15,538 12,447,462 0.12 1.7 2.6 2,091.2 1.7 2.6 2,092.3 1.9 2.8 2,214.5 0.02
    DPL     investor-owned corp. 16,079,755 16,079,755 15,934,751 46,815 28,747 16,743,130 0.23 5.8 3.6 2,082.5 5.8 3.6 2,082.5 5.9 3.6 2,091.4 0.03
    East Kentucky Power Coop     cooperative 10,367,811 10,262,717 10,094,768 59,278 9,933 10,645,985 0.25 11.4 1.9 2,053.7 11.6 1.9 2,074.7 11.7 2.0 2,083.9 0.05
    Intermountain Power Agency     power district 14,449,788 14,449,788 14,444,378 5,692 27,199 14,587,603 0.12 0.8 3.8 2,019.1 0.8 3.8 2,019.1 0.8 3.8 2,019.8 0.02
    Arkansas Electric Coop     cooperative 10,746,279 10,150,533 9,637,627 27,168 13,880 10,843,524 0.24 5.1 2.6 2,018.1 5.4 2.7 2,136.5 5.6 2.8 2,186.9 0.05
    JEA     municipality 14,166,142 10,962,607 8,766,595 14,709 19,076 14,264,461 0.12 2.1 2.7 2,013.9 2.7 3.5 1,936.1 3.2 4.2 2,156.0 0.03
    CMS Energy     investor-owned corp. 19,662,026 18,611,008 17,580,395 73,029 22,818 19,672,875 0.40 7.4 2.3 2,001.1 7.8 2.4 2,087.7 8.3 2.5 2,142.5 0.05
    Allegheny Energy     investor-owned corp. 45,366,816 45,191,485 44,812,634 306,776 72,168 45,283,914 1.32 13.5 3.2 1,996.3 13.6 3.2 2,004.1 13.7 3.2 2,013.5 0.06
    E.ON     foreign-owned corp. 40,121,662 38,169,474 37,634,835 164,277 53,064 40,030,595 0.61 8.2 2.6 1,995.5 8.6 2.8 2,097.5 8.7 2.8 2,109.9 0.03
    Buckeye Power     cooperative 9,755,462 9,755,462 9,698,096 44,287 17,788 9,666,956 0.20 9.1 3.6 1,981.9 9.1 3.6 1,981.9 9.1 3.7 1,990.9 0.04
    TransAlta     foreign-owned corp. 11,552,846 10,215,400 8,727,176 2,318 11,043 11,146,820 0.16 0.4 1.9 1,929.7 0.5 2.2 2,182.4 0.5 2.5 2,402.1 0.04
    Mirant     investor-owned corp. 18,650,653 18,650,653 14,210,591 149,773 16,883 17,921,706 0.32 16.1 1.8 1,921.8 16.1 1.8 1,921.8 20.4 2.1 2,051.5 0.04
    Westar     investor-owned corp. 28,363,276 24,369,610 22,369,076 62,978 32,409 26,852,155 0.56 4.4 2.3 1,893.4 5.2 2.7 2,203.7 5.6 2.7 2,294.3 0.05
    Associated Electric Coop     cooperative 17,530,580 17,530,580 14,614,083 30,095 24,168 16,435,065 0.23 3.4 2.8 1,875.0 3.4 2.8 1,875.0 4.1 3.3 2,070.6 0.03
    AES     investor-owned corp. 43,516,994 40,881,586 32,510,800 72,165 36,012 40,740,911 0.50 3.3 1.7 1,872.4 3.4 1.7 1,935.5 4.2 2.1 2,143.9 0.03
    Seminole Electric Coop     cooperative 10,631,747 10,422,116 8,831,843 19,303 17,543 9,934,151 0.04 3.6 3.3 1,868.8 3.7 3.4 1,886.9 4.4 3.9 2,057.0 0.01
    Grand River Dam Authority     state power authority 7,994,480 6,854,451 5,651,708 14,865 11,388 7,425,458 0.11 3.7 2.8 1,857.6 4.3 3.3 2,166.6 5.3 4.0 2,437.8 0.04
    Ameren     investor-owned corp. 78,866,652 67,736,436 67,092,836 245,006 56,167 73,230,925 2.30 6.2 1.4 1,857.1 7.2 1.7 2,162.2 7.3 1.7 2,172.2 0.07
    Santee Cooper     state power authority 26,395,396 23,676,231 22,435,029 40,356 15,559 24,282,976 0.14 3.1 1.2 1,839.9 3.4 1.3 2,046.5 3.6 1.4 2,105.2 0.01
    NRG     investor-owned corp. 70,827,676 61,339,903 54,484,003 152,584 44,241 64,909,805 1.70 4.3 1.2 1,832.9 5.0 1.4 2,105.4 5.6 1.5 2,208.1 0.06
    Great Plains Energy     investor-owned corp. 24,622,660 20,198,376 19,555,906 54,727 31,454 22,231,748 0.35 4.4 2.6 1,805.8 5.4 3.1 2,201.3 5.6 3.2 2,231.9 0.04
    OGE     investor-owned corp. 26,665,824 26,236,289 17,461,574 47,219 37,053 24,036,301 0.26 3.5 2.8 1,802.8 3.6 2.8 1,832.3 5.4 3.4 2,179.4 0.03
    Lower CO River Authority     state power authority 9,193,884 8,967,765 5,963,342 15,017 5,320 8,266,016 0.07 3.3 1.2 1,798.2 3.3 1.2 1,843.5 5.0 1.1 2,124.3 0.02
    AEP     investor-owned corp. 192,128,241 175,021,763 164,179,849 715,691 261,973 171,253,191 4.05 7.5 2.7 1,782.7 8.2 3.0 1,956.9 8.7 3.0 2,010.3 0.05
    Orlando Utilities Comm     municipality 6,382,443 5,792,967 5,077,573 7,256 7,653 5,618,572 0.00 2.3 2.4 1,760.6 2.5 2.6 1,939.7 2.9 3.0 2,086.8 0.00
    RRI     investor-owned corp. 33,259,684 33,259,684 23,324,016 216,812 42,086 29,170,888 0.95 13.0 2.5 1,754.1 13.0 2.5 1,754.1 18.6 3.5 2,129.6 0.08
    MidAmerican     privately held corp. 93,345,114 81,027,818 68,371,058 134,678 108,027 81,784,623 1.11 2.9 2.3 1,752.3 3.3 2.7 2,018.7 3.9 3.1 2,231.0 0.03
    DTE Energy     investor-owned corp. 52,147,834 42,186,973 41,598,028 220,226 65,014 44,524,717 1.13 8.4 2.5 1,707.6 10.4 3.1 2,110.8 10.6 3.1 2,118.3 0.05
    TECO     investor-owned corp. 17,780,238 17,780,238 10,132,941 9,632 17,698 15,173,074 0.07 1.1 2.0 1,706.7 1.1 2.0 1,527.2 1.9 3.4 2,013.3 0.01
    Xcel     investor-owned corp. 76,812,787 62,226,237 50,815,643 113,245 88,358 64,722,153 0.98 2.9 2.3 1,685.2 3.6 2.8 2,074.6 4.4 3.3 2,291.4 0.04
    Energy Future Holdings     investor-owned corp. 68,308,612 49,073,991 44,750,234 229,952 43,036 55,218,995 2.39 6.7 1.3 1,616.8 9.4 1.8 2,250.4 10.3 1.7 2,333.7 0.11
    CLECO     investor-owned corp. 7,160,172 7,160,172 3,251,894 9,477 6,008 5,780,120 0.08 2.6 1.7 1,614.5 2.6 1.7 1,614.5 5.8 2.5 2,237.2 0.05
    Dynegy     investor-owned corp. 43,922,553 43,653,347 24,194,412 59,633 15,240 35,306,467 0.43 2.7 0.7 1,607.7 2.7 0.7 1,617.3 4.8 1.1 2,163.7 0.04
    Omaha Public Power District     power district 12,267,194 8,707,676 8,474,919 32,511 16,801 9,515,903 0.40 5.3 2.7 1,551.4 7.5 3.9 2,185.6 7.7 3.9 2,213.0 0.10
    Southern     investor-owned corp. 200,145,044 167,701,125 134,153,248 827,413 197,801 155,107,239 3.45 8.3 2.0 1,549.9 9.9 2.4 1,849.8 12.3 2.9 2,105.3 0.05
    PNM Resources     investor-owned corp. 13,053,140 10,069,589 7,521,898 8,152 15,439 9,874,223 0.14 1.2 2.4 1,512.9 1.6 3.1 1,961.2 2.2 4.0 2,220.0 0.04
    NE Public Power District     power district 17,840,913 11,659,843 11,269,259 35,918 23,199 13,083,994 0.15 4.0 2.6 1,466.7 6.2 4.0 2,244.3 6.4 4.1 2,286.7 0.03
    Puget Energy     investor-owned corp. 10,314,350 8,232,646 5,284,988 4,975 8,469 7,502,827 0.15 1.0 1.6 1,454.8 1.2 2.1 1,822.7 1.9 3.2 2,390.6 0.06
    Salt River Project     power district 26,625,838 21,307,360 14,074,122 19,003 31,386 19,343,460 0.35 1.4 2.4 1,453.0 1.8 2.9 1,815.7 2.7 4.4 2,301.9 0.05
    Duke     investor-owned corp. 149,023,541 107,798,695 102,755,813 403,504 125,180 105,512,223 1.32 5.4 1.7 1,416.0 7.5 2.3 1,957.4 7.9 2.4 2,010.9 0.03
    National Grid     foreign-owned corp. 7,134,819 7,134,819 0 6,740 5,328 5,039,561 0.00 1.9 1.5 1,412.7 1.9 1.5 1,412.7 -- -- -- --
    Edison International     investor-owned corp. 85,104,385 63,478,490 47,651,514 184,583 83,120 59,256,143 1.06 4.3 2.0 1,392.6 5.8 2.6 1,862.1 7.7 3.5 2,227.0 0.04
    SCANA     investor-owned corp. 24,988,638 19,788,517 16,464,366 97,056 23,774 17,262,661 0.20 7.8 1.9 1,381.6 9.8 2.4 1,744.7 11.8 2.9 1,912.5 0.02
    Brazos Electric Power Coop     cooperative 6,445,735 6,445,735 1,351,775 5,370 2,421 4,358,985 0.13 1.7 0.8 1,352.5 1.7 0.8 1,352.5 7.9 2.4 2,859.9 0.19
    Tennessee Valley Authority     federal power authority 158,866,850 98,318,649 97,597,845 335,758 168,112 104,775,169 1.49 4.2 2.1 1,319.0 6.8 3.4 2,131.3 6.9 3.4 2,139.2 0.03
    Portland General Electric     investor-owned corp. 12,090,629 9,911,559 5,437,180 11,160 10,728 7,922,414 0.17 1.8 1.8 1,310.5 2.3 2.2 1,598.6 4.1 3.9 2,213.4 0.06
    San Antonio City     municipality 21,592,758 12,995,658 9,579,167 25,871 9,448 13,994,665 0.21 2.4 0.9 1,296.2 4.0 1.5 2,153.7 5.4 1.5 2,424.9 0.04
    Austin Energy     municipality 13,030,226 9,591,387 5,963,342 15,023 4,833 8,259,097 0.07 2.3 0.7 1,267.7 3.1 1.0 1,722.2 5.0 1.1 2,124.3 0.02
    FirstEnergy     investor-owned corp. 82,985,292 49,759,501 49,603,607 215,627 71,013 52,546,488 0.66 5.2 1.7 1,266.4 8.6 2.8 2,063.7 8.6 2.8 2,067.3 0.03
    NV Energy     investor-owned corp. 20,147,812 20,130,537 6,046,028 5,174 14,460 12,591,702 0.06 0.5 1.4 1,249.9 0.5 1.4 1,251.0 1.7 3.7 2,237.5 0.02
    Pinnacle West     investor-owned corp. 27,878,279 19,358,805 12,807,942 14,974 28,108 17,019,048 0.23 1.1 2.0 1,221.0 1.5 2.9 1,758.3 2.3 4.3 2,195.6 0.04
    Los Angeles City     municipality 15,133,171 12,511,917 3,711,190 844 7,610 9,015,319 0.06 0.1 1.0 1,191.5 0.1 1.2 1,441.1 0.4 4.0 2,334.3 0.03
    Progress Energy     investor-owned corp. 93,272,525 62,281,137 42,486,560 210,496 67,455 55,513,274 0.66 4.5 1.4 1,190.3 6.8 2.2 1,782.7 8.7 2.8 2,097.9 0.03
    International Power     foreign-owned corp. 20,721,612 20,679,637 4,926,783 17,450 4,578 12,156,762 0.12 1.7 0.4 1,173.3 1.7 0.4 1,173.1 7.1 1.6 2,067.6 0.05
    PPL     investor-owned corp. 52,597,915 30,806,999 27,785,250 173,942 42,423 30,012,412 0.52 6.6 1.6 1,141.2 11.3 2.8 1,948.4 12.4 3.0 2,043.0 0.04
    Oglethorpe     investor-owned corp. 21,903,347 12,396,019 10,924,172 45,607 9,631 12,234,810 0.29 4.2 0.9 1,117.2 7.4 1.6 1,974.0 8.3 1.7 2,119.4 0.05
    IDACORP     investor-owned corp. 14,472,881 7,493,121 7,264,020 11,760 11,526 7,899,691 0.09 1.6 1.6 1,091.7 3.1 3.1 2,108.5 3.2 3.2 2,135.8 0.02
    Dominion     investor-owned corp. 107,343,219 60,849,788 48,972,868 155,401 64,965 58,468,229 0.82 2.9 1.2 1,089.4 5.1 2.1 1,921.7 6.2 2.5 2,154.3 0.03
    SUEZ Energy     foreign-owned corp. 9,603,021 8,344,246 1,690,807 4,395 3,832 4,875,997 0.02 0.9 0.8 1,015.5 1.1 0.9 1,168.7 5.2 3.3 2,245.1 0.03
    US Power Generating Company     privately held corp. 14,020,213 14,020,213 0 1,264 2,184 6,959,768 0.00 0.2 0.3 992.8 0.2 0.3 992.8 -- -- -- --
    Municipal Elec. Auth. of GA     municipality 12,555,765 6,057,564 5,498,500 22,955 4,841 6,066,745 0.14 3.7 0.8 966.4 7.6 1.6 2,003.0 8.3 1.7 2,119.4 0.05
    Entegra Power     privately held corp. 10,053,909 10,053,909 0 23 549 4,624,001 0.00 0.005 0.1 919.8 0.005 0.1 919.8 -- -- -- --
    Tenaska     investor-owned corp. 18,596,914 18,596,914 0 45 1,694 8,275,922 0.00 0.005 0.2 890.0 0.005 0.2 890.0 -- -- -- --
    Occidental     investor-owned corp. 6,781,563 6,773,681 0 5 554 2,818,855 0.00 0.002 0.2 831.3 0.002 0.2 831.1 -- -- -- --
    General Electric     investor-owned corp. 13,183,265 12,310,004 0 19 902 5,478,125 0.00 0.003 0.1 831.1 0.003 0.1 861.8 -- -- -- --
    TransCanada     foreign-owned corp. 6,517,057 4,683,849 0 107 407 2,692,095 0.00 0.03 0.1 826.2 0.05 0.2 1,149.5 -- -- -- --
    Dow Chemical     investor-owned corp. 11,241,068 10,916,810 0 9 363 4,540,547 0.00 0.002 0.1 807.8 0.002 0.1 802.1 -- -- -- --
    Exxon Mobil     investor-owned corp. 10,878,028 9,922,506 0 9 418 4,279,544 0.00 0.002 0.1 786.8 0.002 0.1 786.3 -- -- -- --
    Calpine     investor-owned corp. 87,644,660 81,019,547 0 196 5,892 33,986,372 0.00 0.004 0.1 775.5 0.005 0.1 832.8 -- -- -- --
    PSEG     investor-owned corp. 64,667,425 34,797,975 12,740,994 63,224 17,264 24,078,221 0.21 2.0 0.5 744.7 3.6 1.0 1,348.1 9.9 2.2 2,177.0 0.03
    Sempra     investor-owned corp. 20,090,804 17,011,614 0 36 532 7,119,054 0.00 0.004 0.1 708.7 0.004 0.1 837.0 -- -- -- --
    Sacramento Municipal Util Dist     municipality 6,770,217 5,619,855 0 12 151 2,389,845 0.00 0.004 0.04 706.0 0.004 0.1 850.5 -- -- -- --
    Constellation     investor-owned corp. 49,854,497 16,871,815 16,085,472 120,129 25,556 16,981,296 0.46 4.8 1.0 681.2 14.2 3.0 2,001.4 14.9 3.1 2,033.3 0.06
    NextEra Energy (formerly FPL)     investor-owned corp. 153,399,071 92,659,283 6,666,142 48,974 34,845 49,545,564 0.20 0.6 0.5 646.0 1.1 0.8 1,069.4 4.9 2.2 2,190.6 0.06
    El Paso Electric     investor-owned corp. 8,043,841 3,420,983 739,152 533 4,715 2,487,313 0.01 0.1 1.2 618.4 0.3 2.8 1,454.2 1.4 5.5 2,050.4 0.04
    Chevron     investor-owned corp. 6,615,108 6,307,838 0 2 29 2,000,402 0.00 0.001 0.01 604.8 0.001 0.01 613.0 -- -- -- --
    Entergy     investor-owned corp. 123,913,830 43,888,167 16,069,899 51,928 40,231 35,642,520 0.56 0.8 0.6 575.3 2.4 1.8 1,623.2 6.2 2.7 2,246.3 0.07
    Avista     investor-owned corp. 7,439,156 3,387,393 1,651,294 1,552 2,620 1,995,988 0.05 0.4 0.7 536.6 0.9 1.5 1,178.5 1.9 3.2 2,390.6 0.06
    International Paper     investor-owned corp. 7,375,253 2,276,976 737,715 0 1,238 982,006 0.02 -- 0.3 266.3 -- 1.1 862.6 -- 3.0 1,382.5 0.06
    New York Power Authority     state power authority 27,792,801 6,674,176 0 147 1,915 3,607,170 0.00 0.01 0.1 259.6 0.04 0.6 1,080.9 -- -- -- --
    US Bureau of Reclamation     federal power authority 45,907,183 4,258,084 4,254,111 927 8,457 4,964,828 0.07 0.04 0.4 216.3 0.4 4.0 2,332.0 0.4 4.0 2,334.1 0.03
    NC Public Power     municipality 12,344,546 1,235,258 1,232,397 4,166 643 1,229,942 0.02 0.7 0.1 199.3 6.7 1.0 1,991.4 6.8 1.0 1,994.4 0.04
    Exelon     investor-owned corp. 150,557,232 9,007,627 7,787,398 50,072 13,212 9,239,010 0.23 0.7 0.2 122.7 11.1 2.9 2,051.4 12.8 3.3 2,136.7 0.06
    PG&E     investor-owned corp. 25,706,459 524,966 0 27 1,104 411,305 0.00 0.002 0.1 32.0 0.1 4.2 1,567.0 -- -- -- --
    US Corps of Engineers     federal power authority 67,200,768 0 0 0 0 0 0.00 -- -- -- -- -- -- -- -- -- --
    PUD No 2 of Grant County     power district 9,406,902 0 0 0 0 0 0.00 -- -- -- -- -- -- -- -- -- --
    PUD No 1 of Chelan County     power district 8,590,131 0 0 0 0 0 0.00 -- -- -- -- -- -- -- -- -- --
    Energy Northwest     municipality 9,367,636 0 0 0 0 0 0.00 -- -- -- -- -- -- -- -- -- --
 
Total (in thousands)   3,527,028 2,471,735 1,803,793 7,069 2,723 2,273,588 0.04 -- -- -- -- -- -- -- -- -- --
Average (mean)   35,270,281 24,717,349 18,037,930 70,691 27,234 22,735,883 0.40 3.7 1.7 1,438.6 4.6 2.2 1,778.4 6.5 3.0 2,189.1 0.04
Median   16,882,883 12,453,968 9,269,437 25,944 15,340 12,195,786 0.17 2.9 1.7 1,489.8 3.6 2.3 1,944.0 5.8 3.0 2,177.0 0.04
* Based on 2008 data. Mercury emissions data is for coal plants only. Mercury emissions rate is in pounds per gigawatt hour (lbs/GWh).
All averages are weighted averages based on the total generation and emissions associated with each category.
For data methodology, see the contents page.
 
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