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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*
    US Power Generating Company     privately held corp. 58 47 -- 79 82 75 -- 79 81 72 81 85 85 -- -- -- --
    US Corps of Engineers     federal power authority 18 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
    TransCanada     foreign-owned corp. 98 90 -- 85 93 89 -- 83 88 78 84 87 82 -- -- -- --
    Tenaska     investor-owned corp. 46 37 -- 86 84 65 -- 85 82 75 87 86 87 -- -- -- --
    Sempra     investor-owned corp. 43 41 -- 87 91 74 -- 89 94 83 90 94 91 -- -- -- --
    Sacramento Municipal Util Dist     municipality 95 89 -- 91 95 91 -- 88 95 84 89 95 90 -- -- -- --
    PUD No 2 of Grant County     power district 82 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
    PUD No 1 of Chelan County     power district 85 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
    PG&E     investor-owned corp. 35 96 -- 88 86 96 -- 91 91 96 83 3 71 -- -- -- --
    Occidental     investor-owned corp. 94 82 -- 94 89 88 -- 94 84 76 94 88 93 -- -- -- --
    New York Power Authority     state power authority 31 83 -- 84 83 87 -- 84 85 92 85 83 83 -- -- -- --
    National Grid     foreign-owned corp. 92 78 -- 70 73 80 -- 58 55 53 63 68 75 -- -- -- --
    General Electric     investor-owned corp. 60 52 -- 90 87 79 -- 90 86 77 91 89 89 -- -- -- --
    Exxon Mobil     investor-owned corp. 71 65 -- 92 92 86 -- 92 92 80 92 92 95 -- -- -- --
    Entegra Power     privately held corp. 77 63 -- 89 90 83 -- 86 89 74 88 91 86 -- -- -- --
    Energy Northwest     municipality 83 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
    Dow Chemical     investor-owned corp. 69 56 -- 93 94 84 -- 93 93 79 93 93 94 -- -- -- --
    Chevron     investor-owned corp. 97 86 -- 95 96 92 -- 95 96 88 95 96 96 -- -- -- --
    Calpine     investor-owned corp. 11 7 -- 83 72 21 -- 87 87 81 86 90 92 -- -- -- --
    Orlando Utilities Comm     municipality 100 88 71 69 69 78 81 55 29 37 60 41 49 66 43 63 81
    Seminole Electric Coop     cooperative 73 58 52 54 43 58 76 41 9 28 45 14 54 57 15 68 80
    Santee Cooper     state power authority 34 27 21 39 48 25 57 47 62 31 51 72 36 63 77 60 79
    TECO     investor-owned corp. 49 39 45 65 42 42 70 67 39 41 72 56 72 70 24 75 78
    Dairyland Power Coop     cooperative 96 84 63 45 59 73 74 5 8 11 11 15 15 13 26 36 77
    Intermountain Power Agency     power district 56 46 35 71 30 43 63 72 4 16 76 9 37 77 17 73 76
    NV Energy     investor-owned corp. 42 32 64 73 52 47 72 76 57 62 77 71 78 74 18 26 75
    UniSource     investor-owned corp. 67 53 43 64 49 48 62 60 22 13 65 43 29 71 49 32 74
    IDACORP     investor-owned corp. 55 76 59 62 57 70 66 63 54 69 55 20 26 64 35 51 73
    SCANA     investor-owned corp. 36 33 28 21 35 36 46 15 44 55 10 46 65 8 48 80 72
    Lower CO River Authority     state power authority 84 71 65 58 74 66 69 46 64 35 53 74 58 52 79 53 71
    Austin Energy     municipality 62 68 65 57 76 67 68 54 72 60 56 77 66 52 79 53 70
    Duke     investor-owned corp. 6 3 3 3 4 3 7 24 49 52 24 50 46 28 61 76 69
    SUEZ Energy     foreign-owned corp. 81 73 76 75 79 82 79 70 69 71 74 79 81 51 27 25 68
    Tri-State     cooperative 59 48 38 66 38 41 49 65 12 7 70 25 11 76 42 23 67
    NE Public Power District     power district 48 54 41 43 36 46 53 38 23 49 32 6 13 36 8 22 66
    FirstEnergy     investor-owned corp. 13 14 9 10 9 13 15 26 48 61 16 32 34 20 50 67 65
    JEA     municipality 57 55 53 61 40 44 61 56 19 18 58 12 50 65 7 45 64
    DPL     investor-owned corp. 52 44 32 36 28 39 41 23 6 14 34 11 31 40 20 62 63
    OGE     investor-owned corp. 32 25 26 35 20 27 37 42 15 34 49 30 59 47 25 40 62
    Tennessee Valley Authority     federal power authority 3 4 4 4 3 4 6 35 37 57 28 13 24 33 23 49 61
    AES     investor-owned corp. 26 20 17 24 21 17 23 45 51 27 52 62 51 58 67 47 60
    Progress Energy     investor-owned corp. 10 10 14 11 10 11 16 30 56 65 30 51 62 17 53 61 59
    Associated Electric Coop     cooperative 50 40 34 46 33 40 43 44 16 26 50 35 55 59 29 65 58
    Hoosier Energy     cooperative 86 74 56 40 62 64 58 6 25 12 12 44 22 14 56 44 57
    E.ON     foreign-owned corp. 27 21 16 14 14 18 18 12 21 21 15 33 28 18 51 58 56
    MidAmerican     privately held corp. 9 6 5 18 5 5 10 50 33 39 54 39 38 62 37 29 55
    PSEG     investor-owned corp. 19 22 40 26 44 26 45 57 76 82 46 78 77 12 65 41 54
    Dominion     investor-owned corp. 8 13 10 15 12 10 14 49 61 70 41 54 53 39 57 46 53
    Big Rivers Electric     cooperative 79 79 60 53 45 52 64 37 7 1 36 1 3 42 2 11 52
    US Bureau of Reclamation     federal power authority 23 91 73 80 68 81 71 82 79 93 79 7 5 80 13 15 51
    Los Angeles City     municipality 53 50 74 81 70 63 73 81 66 64 82 73 74 79 12 14 50
    Dynegy     investor-owned corp. 25 18 19 28 51 20 27 51 74 45 57 82 68 55 78 43 49
    TransAlta     foreign-owned corp. 68 60 54 77 60 54 52 78 43 23 78 53 18 78 60 7 48
    Great Plains Energy     investor-owned corp. 37 31 23 31 25 29 32 31 26 33 37 18 16 44 32 28 47
    El Paso Electric     investor-owned corp. 87 92 80 82 77 90 80 80 63 87 80 36 73 75 1 70 46
    Pinnacle West     investor-owned corp. 30 34 39 59 29 37 40 68 38 63 69 29 63 68 5 37 45
    PPL     investor-owned corp. 20 24 18 13 17 22 22 19 53 67 6 37 48 6 44 71 44
    Grand River Dam Authority     state power authority 88 80 67 60 58 72 65 39 14 29 43 16 19 50 11 3 43
    PNM Resources     investor-owned corp. 61 62 58 68 50 59 55 66 30 48 68 21 45 69 10 31 42
    Xcel     investor-owned corp. 15 11 8 20 6 8 12 48 34 42 47 31 33 56 30 21 41
    NC Public Power     municipality 64 95 79 76 88 94 77 73 90 94 31 76 42 35 81 78 40
    Buckeye Power     cooperative 78 67 48 38 41 60 47 7 5 22 14 10 43 15 19 79 39
    San Antonio City     municipality 39 49 50 51 66 45 44 53 68 59 44 69 21 48 76 4 38
    Edison International     investor-owned corp. 12 9 11 12 7 9 11 33 41 54 35 42 56 29 22 30 37
    Mirant     investor-owned corp. 45 35 36 17 46 35 33 1 46 24 1 60 52 1 66 69 36
    CMS Energy     investor-owned corp. 44 36 25 23 37 31 29 17 32 19 21 47 30 25 59 48 35
    CLECO     investor-owned corp. 91 77 75 67 71 77 67 52 50 44 59 63 69 41 58 27 34
    International Power     foreign-owned corp. 41 29 72 56 78 51 60 61 78 66 66 84 80 32 74 66 33
    Arkansas Electric Coop     cooperative 72 61 49 49 54 55 39 28 24 17 38 38 23 46 52 39 32
    AEP     investor-owned corp. 2 1 1 2 1 1 1 16 18 36 20 26 47 19 41 77 31
    East Kentucky Power Coop     cooperative 74 59 46 29 64 56 38 4 42 15 5 57 32 9 69 64 30
    Westar     investor-owned corp. 29 26 22 27 24 24 19 32 36 25 40 40 14 43 54 20 29
    Vectren     investor-owned corp. 93 81 61 47 63 68 50 10 11 4 18 24 7 21 40 13 28
    Wisconsin Energy     investor-owned corp. 40 30 24 41 39 28 24 43 45 9 48 58 10 61 68 6 27
    Salt River Project     power district 33 28 37 55 26 33 31 64 31 51 64 27 61 67 4 19 26
    NiSource     investor-owned corp. 54 45 33 30 27 34 30 14 2 2 22 4 1 26 6 2 25
    Southern     investor-owned corp. 1 2 2 1 2 2 2 9 40 47 9 48 57 7 46 59 24
    Municipal Elec. Auth. of GA     municipality 63 87 68 52 75 76 56 40 70 73 23 65 40 23 72 56 23
    Oglethorpe     investor-owned corp. 38 51 42 37 65 50 35 36 67 68 26 66 44 22 71 55 22
    ALLETE     investor-owned corp. 70 57 44 42 34 49 36 20 1 8 29 2 4 34 3 12 21
    DTE Energy     investor-owned corp. 21 19 15 8 11 16 9 8 28 40 8 19 25 10 38 57 20
    Puget Energy     investor-owned corp. 75 75 70 74 67 71 54 69 52 50 71 55 60 72 33 9 19
    Avista     investor-owned corp. 89 93 77 78 80 93 75 77 73 90 75 67 79 72 34 10 18
    Constellation     investor-owned corp. 22 42 29 19 31 38 25 29 65 85 2 22 41 3 36 72 17
    Allegheny Energy     investor-owned corp. 24 16 12 5 8 15 8 2 10 20 3 17 39 4 31 74 16
    Exelon     investor-owned corp. 5 70 57 33 55 62 42 74 83 95 7 28 35 5 28 50 15
    NextEra Energy (formerly FPL)     investor-owned corp. 4 5 62 34 22 14 48 75 77 86 73 80 84 54 64 38 14
    Portland General Electric     investor-owned corp. 66 66 69 63 61 69 51 59 47 58 62 52 70 60 16 33 13
    NRG     investor-owned corp. 16 12 7 16 15 7 5 34 60 32 42 70 27 45 75 35 12
    International Paper     investor-owned corp. 90 94 81 -- 85 95 78 -- 80 91 -- 75 88 -- 45 81 11
    Integrys     investor-owned corp. 80 69 51 48 53 57 34 22 13 10 33 23 9 37 39 18 10
    Ameren     investor-owned corp. 14 8 6 6 13 6 4 21 58 30 27 64 20 31 73 42 9
    Basin Electric Power Coop     cooperative 51 43 30 25 23 32 21 11 3 3 19 5 2 24 9 8 8
    Entergy     investor-owned corp. 7 17 31 32 19 19 20 71 75 89 61 59 67 38 55 24 7
    Alliant Energy     investor-owned corp. 47 38 27 22 32 30 17 13 20 5 17 34 6 16 47 5 6
    RRI     investor-owned corp. 28 23 20 9 18 23 13 3 27 38 4 45 64 2 21 52 5
    Great River Energy     cooperative 76 64 47 50 56 53 26 27 35 6 39 49 8 49 63 17 4
    Omaha Public Power District     power district 65 72 55 44 47 61 28 25 17 46 25 8 17 30 14 34 3
    Energy Future Holdings     investor-owned corp. 17 15 13 7 16 12 3 18 59 43 13 61 12 11 70 16 2
    Brazos Electric Power Coop     cooperative 99 85 78 72 81 85 59 62 71 56 67 81 76 27 62 1 1
* 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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