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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*
  Sempra   investor-owned corp. 12,623,392 11,275,734 -- 25 351 4,881,068 -- 0.004 0.06 773 0.004 0.1 866 -- -- -- --
  Occidental   investor-owned corp. 13,408,301 13,324,148 -- 9 601 6,182,551 -- 0.001 0.09 922 0.001 0.1 920 -- -- -- --
  Exxon Mobil   investor-owned corp. 11,357,326 10,480,435 -- 19 1,129 4,209,707 -- 0.003 0.2 741 0.002 0.1 728 -- -- -- --
  PUD No 1 of Chelan County   power district 10,276,346 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  PUD No 2 of Grant County   power district 9,901,175 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  Energy Northwest   municipality 9,707,717 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  EDP   foreign-owned corp. 9,646,764 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  BP   foreign-owned corp. 11,605,194 7,454,513 -- 80 364 3,213,419 -- 0.01 0.06 554 0.02 0.1 736 -- -- -- --
  Entegra Power   privately held corp. 11,875,963 11,875,963 -- 28 545 5,458,634 -- 0.005 0.09 919 0.005 0.1 919 -- -- -- --
  Iberdrola   foreign-owned corp. 15,453,112 854,629 -- 2 63 374,482 -- 0.000 0.008 48 0.004 0.1 876 -- -- -- --
  Dow Chemical   investor-owned corp. 12,866,292 12,001,662 -- 9 471 5,483,267 -- 0.001 0.07 852 0.002 0.1 847 -- -- -- --
  EDF   foreign-owned corp. 18,073,060 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  New York Power Authority   state power authority 25,020,761 4,827,395 -- 12 244 2,205,688 -- 0.001 0.02 176 0.005 0.1 914 -- -- -- --
  US Corps of Engineers   federal power authority 76,522,954 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  TransCanada   foreign-owned corp. 7,779,505 6,251,299 -- 36 1,626 3,489,770 -- 0.009 0.4 897 0.01 0.5 1,116 -- -- -- --
  Centrica   foreign-owned corp. 6,345,032 6,345,032 -- 15 920 2,886,621 -- 0.005 0.3 910 0.005 0.3 910 -- -- -- --
  LS Power   privately held corp. 7,662,126 7,346,863 -- 20 1,150 3,803,186 -- 0.005 0.3 993 0.005 0.3 1,035 -- -- -- --
  International Paper   investor-owned corp. 7,508,457 1,823,299 320,936 -- 2,320 809,132 -- -- 0.6 216 -- 2.5 888 -- 7.7 1,529 --
  PG&E   investor-owned corp. 31,842,020 6,307,184 -- 13 135 2,731,788 -- 0.001 0.008 172 0.004 0.0 866 -- -- -- --
  Seattle City Light   municipality 6,934,054 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  E.ON   foreign-owned corp. 6,911,004 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  Energy Capital Partners   privately held corp. 26,777,986 26,777,986 -- 61 1,499 12,045,879 -- 0.005 0.1 900 0.005 0.1 900 -- -- -- --
  Sacramento Municipal Util Dist   municipality 6,534,021 4,882,409 -- 11 127 2,133,246 -- 0.003 0.04 653 0.001 0.0 874 -- -- -- --
  Tenaska   privately held corp. 18,017,712 17,927,703 -- 39 887 7,723,908 -- 0.004 0.10 857 0.004 0.1 862 -- -- -- --
  Calpine   investor-owned corp. 113,100,124 106,539,835 -- 303 8,133 46,588,292 -- 0.005 0.1 824 0.005 0.2 871 -- -- -- --
  Brazos Electric Power Coop   cooperative 6,699,582 6,699,582 -- 15 607 2,937,460 -- 0.004 0.2 877 0.004 0.2 877 -- -- -- --
  J-Power   foreign-owned corp. 10,010,973 10,010,973 199,152 119 994 4,645,815 0.00 0.02 0.2 928 0.02 0.2 928 1.0 1.1 2,219 0.00
  ArcLight Capital   privately held corp. 12,509,279 8,923,973 592,389 559 732 4,603,115 0.00 0.09 0.1 736 0.1 0.2 1,032 1.8 0.8 2,390 0.00
  Intermountain Power Agency   power district 9,763,629 9,763,629 9,755,484 3,551 17,182 10,004,734 0.00 0.73 3.5 2,049 0.7 3.5 2,049 0.7 3.5 2,050 0.00
  Rockland Capital   privately held corp. 17,663,729 17,663,729 162,180 1,083 1,280 7,095,254 0.00 0.12 0.1 803 0.1 0.1 803 12.4 4.8 2,526 0.04
  Avista   investor-owned corp. 6,711,669 2,414,438 1,257,340 1,001 1,483 1,927,563 0.01 0.30 0.4 574 0.8 1.2 1,597 1.6 2.4 2,313 0.01
  NC Public Power   municipality 11,501,099 1,102,260 1,091,188 1,476 970 1,223,557 0.01 0.26 0.2 213 2.7 1.8 2,220 2.7 1.8 2,224 0.01
  Waste Management   investor-owned corp. 6,306,811 519,718 357,436 476 446 625,359 0.01 0.15 0.1 198 1.8 1.7 2,407 2.7 2.5 3,038 0.05
  El Paso Electric   investor-owned corp. 9,356,666 4,246,359 690,688 574 4,533 3,052,206 0.01 0.12 1.0 652 0.3 2.1 1,438 1.6 5.7 2,191 0.03
  Portland General Electric   investor-owned corp. 9,333,533 6,276,849 3,388,771 8,806 3,921 5,011,199 0.01 1.89 0.8 1,074 2.8 1.2 1,597 5.2 2.2 2,234 0.01
  Puget Holdings   privately held corp. 9,261,355 6,698,718 4,024,135 3,217 4,849 5,859,974 0.02 0.69 1.0 1,265 1.0 1.4 1,750 1.6 2.4 2,313 0.01
  PNM Resources   investor-owned corp. 10,479,115 7,239,460 6,009,900 3,184 11,288 7,243,267 0.02 0.61 2.2 1,382 0.9 3.1 2,001 1.1 3.7 2,206 0.01
  TECO   investor-owned corp. 18,307,844 18,307,844 10,677,804 10,058 5,508 15,002,416 0.02 1.10 0.6 1,639 1.0 0.6 1,639 1.7 0.9 2,163 0.00
  Municipal Elec. Auth. of GA   municipality 12,635,108 5,606,379 3,762,752 6,966 2,640 4,908,974 0.02 1.10 0.4 777 2.5 0.9 1,751 3.7 1.4 2,202 0.01
  Riverstone   privately held corp. 14,726,182 14,458,622 6,700,085 12,555 8,840 11,564,397 0.03 1.71 1.2 1,571 1.7 1.2 1,600 3.7 2.2 2,296 0.01
  NextEra Energy   investor-owned corp. 170,305,651 106,479,642 4,969,297 10,797 19,255 50,603,271 0.04 0.13 0.2 594 0.2 0.4 950 3.2 2.0 2,276 0.02
  East Kentucky Power Coop   cooperative 10,786,208 10,690,966 9,790,359 14,321 5,453 11,147,393 0.05 2.66 1.0 2,067 2.7 1.0 2,085 2.9 1.1 2,147 0.01
  Oglethorpe   cooperative 25,109,426 14,926,936 7,549,256 15,149 5,765 11,609,069 0.05 1.21 0.5 925 2.0 0.8 1,555 4.0 1.4 2,184 0.01
  Seminole Electric Coop   cooperative 10,388,620 10,388,620 7,571,945 13,769 2,278 9,210,549 0.05 2.65 0.4 1,773 2.7 0.4 1,773 3.6 0.5 2,080 0.01
  Hoosier Energy   cooperative 6,662,508 6,644,478 6,061,784 11,061 2,859 6,743,227 0.06 3.32 0.9 2,024 3.3 0.9 2,030 3.6 0.9 2,131 0.02
  Los Angeles City   municipality 13,967,341 10,719,272 3,333,975 952 3,641 7,407,908 0.06 0.14 0.5 1,061 0.2 0.7 1,382 0.6 2.1 2,065 0.03
  SCANA   investor-owned corp. 24,879,650 19,526,909 12,019,599 27,891 9,735 15,998,957 0.06 2.24 0.8 1,286 2.9 1.0 1,639 4.6 1.5 2,101 0.01
  JEA   municipality 12,736,599 12,734,543 6,244,926 13,825 13,224 10,408,309 0.06 2.17 2.1 1,634 2.2 2.1 1,634 4.1 3.6 2,148 0.02
  Austin Energy   municipality 8,665,104 5,698,049 3,027,645 422 2,439 5,136,163 0.06 0.10 0.6 1,185 0.1 0.9 1,803 0.3 1.1 2,416 0.04
  NV Energy   investor-owned corp. 21,839,064 21,827,135 3,478,529 2,878 5,423 11,723,976 0.06 0.26 0.5 1,074 0.3 0.5 1,074 1.6 2.4 2,252 0.04
  PSEG   investor-owned corp. 53,332,175 23,536,334 5,183,635 8,715 9,772 13,809,870 0.07 0.33 0.4 518 0.7 0.8 1,173 3.3 3.2 2,051 0.03
  US Bureau of Reclamation   federal power authority 49,785,503 3,813,136 3,810,257 1,057 3,952 3,936,671 0.07 0.04 0.2 158 0.6 2.1 2,065 0.6 2.1 2,065 0.03
  Edison International   investor-owned corp. 19,837,647 11,468,834 4,736,148 3,871 13,751 8,084,204 0.07 0.39 1.4 815 0.7 2.4 1,410 1.6 5.7 2,191 0.03
  UniSource   investor-owned corp. 8,251,780 8,230,660 6,800,391 3,546 8,759 7,926,707 0.08 0.86 2.1 1,921 0.9 2.1 1,926 1.0 2.5 2,167 0.02
  CLECO   investor-owned corp. 9,898,725 9,898,725 3,377,575 14,837 5,880 8,146,327 0.08 3.00 1.2 1,646 3.0 1.2 1,646 7.8 1.9 2,399 0.05
  Exelon   investor-owned corp. 192,607,692 32,551,267 7,774,428 15,296 14,791 19,632,361 0.09 0.16 0.2 204 0.9 0.9 1,206 3.9 3.3 2,012 0.02
  Santee Cooper   state power authority 23,369,755 20,605,923 15,847,224 13,521 6,970 18,661,167 0.09 1.16 0.6 1,597 1.3 0.7 1,811 1.7 0.8 2,052 0.01
  Dynegy   investor-owned corp. 40,563,204 40,563,204 19,843,053 28,725 10,854 31,331,905 0.09 1.42 0.5 1,545 1.4 0.5 1,545 2.9 1.0 2,251 0.01
  Big Rivers Electric   cooperative 9,150,785 9,150,785 7,702,978 15,933 10,595 10,373,198 0.10 3.48 2.3 2,267 3.5 2.3 2,267 4.1 2.7 2,237 0.03
  San Antonio City   municipality 26,637,386 19,219,749 13,076,523 10,433 6,723 16,905,591 0.10 0.78 0.5 1,269 1.1 0.7 1,759 1.6 0.8 2,122 0.02
  Edison Mission Energy   privately held corp. 32,240,099 26,863,086 21,929,134 53,247 12,923 27,869,026 0.11 3.30 0.8 1,729 4.0 1.0 2,070 4.9 1.2 2,390 0.01
  Lower CO River Authority   state power authority 9,632,677 9,575,337 5,292,226 720 3,653 8,343,861 0.11 0.15 0.8 1,732 0.2 0.8 1,743 0.3 1.1 2,416 0.04
  IDACORP   investor-owned corp. 14,140,926 6,125,557 5,564,378 6,273 6,091 6,486,415 0.11 0.89 0.9 917 2.0 2.0 2,118 2.3 2.2 2,228 0.04
  Grand River Dam Authority   state power authority 6,740,155 6,456,107 4,029,208 11,977 10,111 5,955,050 0.11 3.55 3.0 1,767 3.7 3.1 1,845 5.9 5.0 2,421 0.06
  NE Public Power District   power district 16,294,768 10,213,714 9,859,064 29,203 12,767 11,166,697 0.11 3.58 1.6 1,371 5.7 2.5 2,187 5.9 2.6 2,223 0.02
  Buckeye Power   cooperative 7,021,565 7,021,565 6,839,382 15,889 4,883 7,286,813 0.11 4.53 1.4 2,076 4.5 1.4 2,076 4.6 1.4 2,094 0.03
  Associated Electric Coop   cooperative 16,254,844 16,254,844 10,972,715 22,601 22,778 14,193,532 0.12 2.78 2.8 1,746 2.8 2.8 1,746 4.1 4.1 2,154 0.02
  Tri-State   cooperative 13,012,425 13,012,425 11,964,427 7,713 15,910 13,843,506 0.12 1.19 2.4 2,128 1.2 2.4 2,128 1.3 2.6 2,211 0.02
  Integrys   investor-owned corp. 8,405,331 7,721,352 7,517,815 16,324 4,862 8,362,329 0.14 3.88 1.2 1,990 4.2 1.3 2,166 4.3 1.3 2,191 0.04
  ALLETE   investor-owned corp. 8,591,911 7,780,111 7,767,515 7,243 6,275 9,061,548 0.15 1.69 1.5 2,109 1.8 1.5 2,329 1.8 1.5 2,328 0.04
  NiSource   investor-owned corp. 13,271,037 13,243,465 10,005,951 28,304 8,726 13,124,969 0.16 4.27 1.3 1,978 4.3 1.3 1,982 5.7 1.7 2,343 0.03
  Wisconsin Energy   investor-owned corp. 19,922,340 18,911,547 13,648,277 12,501 9,697 18,599,651 0.18 1.25 1.0 1,867 1.3 1.0 1,967 1.8 1.4 2,378 0.03
  Salt River Project   power district 26,156,031 20,429,375 15,105,910 5,875 22,373 18,861,147 0.18 0.45 1.7 1,442 0.6 2.2 1,846 0.8 2.9 2,206 0.02
  OGE   investor-owned corp. 26,375,474 24,781,915 13,650,034 37,706 30,063 22,044,680 0.22 2.86 2.3 1,672 3.0 2.4 1,779 5.5 3.5 2,344 0.03
  Pinnacle West   investor-owned corp. 28,735,733 19,334,819 11,943,396 8,858 23,820 16,429,640 0.23 0.62 1.7 1,143 0.9 2.5 1,699 1.5 3.9 2,198 0.04
  Great Plains Energy   investor-owned corp. 27,540,664 23,199,114 22,578,062 23,816 15,797 24,886,806 0.24 1.73 1.1 1,807 2.1 1.4 2,145 2.1 1.4 2,162 0.02
  General Electric   investor-owned corp. 27,906,432 27,619,528 9,982,178 99,909 11,284 18,342,449 0.24 7.16 0.8 1,315 7.2 0.8 1,328 20.0 2.1 2,144 0.05
  Arkansas Electric Coop   cooperative 12,688,801 12,256,097 8,896,971 26,863 12,271 11,470,943 0.24 4.23 1.9 1,808 4.4 2.0 1,872 6.0 2.6 2,229 0.05
  Omaha Public Power District   power district 12,870,103 12,824,020 12,586,437 28,144 11,813 13,763,450 0.25 4.37 1.8 2,139 4.4 1.8 2,147 4.5 1.9 2,160 0.04
  Dominion   investor-owned corp. 100,365,613 51,242,184 24,969,129 49,916 30,078 38,998,412 0.25 0.99 0.6 777 1.9 1.2 1,522 3.9 2.2 2,159 0.02
  GDF Suez   foreign-owned corp. 36,576,048 35,020,994 8,812,460 22,063 8,463 23,095,465 0.30 1.21 0.5 1,263 1.3 0.5 1,317 5.0 1.4 2,251 0.07
  CMS Energy   investor-owned corp. 21,246,994 20,139,484 14,134,206 45,823 16,850 18,527,325 0.34 4.31 1.6 1,744 4.5 1.6 1,798 6.4 2.2 2,213 0.05
  Great River Energy   cooperative 11,116,472 10,987,969 10,466,364 18,653 10,591 12,236,293 0.34 3.36 1.9 2,201 3.4 1.9 2,227 3.6 2.0 2,268 0.06
  Entergy   investor-owned corp. 129,473,500 52,237,170 14,198,178 48,832 44,361 38,197,909 0.38 0.75 0.7 590 1.9 1.7 1,460 6.9 2.4 2,291 0.05
  Westar   investor-owned corp. 25,452,651 21,120,692 18,950,155 15,353 19,549 23,630,640 0.39 1.21 1.5 1,857 1.5 1.9 2,238 1.6 1.9 2,350 0.04
  Alliant Energy   investor-owned corp. 18,054,859 16,615,030 14,095,636 51,340 15,727 17,686,813 0.41 5.69 1.7 1,959 6.2 1.9 2,128 7.3 2.2 2,327 0.06
  Basin Electric Power Coop   cooperative 18,505,623 17,429,225 17,253,669 56,393 23,423 20,267,828 0.47 6.09 2.5 2,190 6.5 2.7 2,326 6.5 2.7 2,338 0.05
  AES   investor-owned corp. 38,835,825 36,027,588 32,251,317 82,222 31,698 37,831,515 0.48 4.23 1.6 1,948 4.6 1.8 2,100 5.1 1.9 2,175 0.03
  Xcel   investor-owned corp. 73,518,713 59,380,824 42,479,509 71,809 51,468 56,040,552 0.62 1.95 1.4 1,525 2.4 1.7 1,887 3.4 2.2 2,208 0.03
  Duke   investor-owned corp. 231,651,968 160,639,617 100,914,257 213,024 99,653 134,277,330 0.67 1.84 0.9 1,159 2.6 1.2 1,672 4.2 1.9 2,119 0.01
  Tennessee Valley Authority   federal power authority 144,629,635 81,096,895 63,637,611 140,601 54,443 77,354,100 0.68 1.94 0.8 1,070 3.5 1.3 1,908 4.4 1.7 2,179 0.02
  DTE Energy   investor-owned corp. 40,658,284 34,321,586 32,534,162 128,919 37,070 37,442,131 0.72 6.34 1.8 1,842 7.5 2.1 2,182 7.9 2.2 2,228 0.04
  PPL   investor-owned corp. 85,139,682 65,461,096 54,625,698 114,899 70,601 65,002,197 0.76 2.70 1.7 1,527 3.5 2.2 1,986 4.2 2.5 2,178 0.03
  Ameren   investor-owned corp. 69,114,135 57,343,473 55,357,646 117,193 32,923 63,229,827 0.83 3.39 1.0 1,830 4.1 1.1 2,205 4.2 1.2 2,242 0.03
  MidAmerican   privately held corp. 89,090,054 70,101,441 61,773,074 83,796 75,627 72,719,467 0.91 1.88 1.7 1,632 2.4 2.2 2,075 2.7 2.4 2,228 0.03
  FirstEnergy   investor-owned corp. 103,305,344 71,756,986 67,144,185 127,886 80,663 74,638,484 1.00 2.48 1.6 1,445 3.6 2.2 2,080 3.7 2.4 2,129 0.03
  NRG   investor-owned corp. 96,653,635 86,572,457 57,227,121 187,622 58,677 80,117,490 1.14 3.88 1.2 1,658 4.3 1.4 1,851 6.5 1.8 2,219 0.04
  Southern   investor-owned corp. 175,262,917 140,737,150 65,533,834 213,429 68,543 104,586,955 1.35 2.44 0.8 1,193 3.0 1.0 1,484 6.5 2.0 2,199 0.04
  AEP   investor-owned corp. 163,368,015 143,621,070 118,582,788 312,683 112,520 141,226,882 1.96 3.83 1.4 1,729 4.4 1.6 1,967 5.3 1.7 2,136 0.03
  Energy Future Holdings   privately held corp. 70,482,556 50,585,632 49,149,851 166,431 31,430 60,215,174 2.20 4.72 0.9 1,709 6.6 1.2 2,381 6.8 1.2 2,403 0.09
 
Total (in thousands)   3,462,096 2,340,966 1,335,414 2,993 1,468 1,946,138 0.02 -- -- -- -- -- -- -- -- -- --
Average (mean)   34,620,956 23,409,663 13,354,137 29,934 14,684 19,461,381 0.21 1.7 1.0 1,275 2.0 1.3 1,625 3.9 2.3 2,225 0.03
Median   15,089,647 11,938,813 6,472,505 8,832 6,499 10,188,966 0.06 1.2 0.8 1,278 1.7 1.2 1,748 3.7 2.1 2,211 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" (2014) for
a discussion of the methodology.

 
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