NOₓ Emissions (thousand tons) NOₓ Rate (lb/mmBtu)
Primary Fuel 2000 2005 2010 2017 2000 2005 2010 2017
Coal NOₓ Emissions (thousand tons) 4,587 3,356 1,896 918 NOₓ Rate (lb/mmBtu) 0.44 0.32 0.20 0.14
Gas NOₓ Emissions (thousand tons) 355 167 142 131 NOₓ Rate (lb/mmBtu) 0.18 0.06 0.04 0.03
Oil NOₓ Emissions (thousand tons) 162 104 20 4 NOₓ Rate (lb/mmBtu) 0.31 0.25 0.13 0.11
Other NOₓ Emissions (thousand tons) 2 6 5 7 NOₓ Rate (lb/mmBtu) 0.24 0.42 0.13 0.10
Total / Average NOₓ Emissions (thousand tons) 5,106 3,633 2,063 1,060 NOₓ Rate (lb/mmBtu) 0.40 0.27 0.16 0.09