Safety & Environment
Air Quality/Non-GHG Emissions
We predominantly use natural gas for energy production. However, to maintain reliability during periods of gas-system limitations, we retain backup fuel sources. No. 4 oil and Kerosene are the backup fuels currently in use at our steam and electric generating stations. By the end of 2024, our generating units using No. 4 oil will be fully transitioned to No. 2 oil, which is lighter and has a lower concentration of criteria pollutants than No. 4 oil, and aligns with local mandates aimed at reducing local air pollution and GHG emissions.
DIRECT EMISSIONS (thousand metric tons)
NOₓ |
SO₂ |
|
|---|---|---|
2020 |
1.00 |
0.02 |
2019 |
1.23 |
0.09 |
2018 |
1.37 |
0.20 |
2017 |
1.16 |
0.11 |
2016 |
1.24 |
0.13 |
2015 |
1.49 |
0.32 |
2014 |
1.65 |
0.33 |
2013 |
1.90 |
0.54 |
2012 |
1.79 |
0.56 |
2011 |
2.17 |
0.93 |
2010 |
2.47 |
1.28 |
2009 |
2.49 |
1.53 |
2008 |
2.31 |
1.41 |
2007 |
2.79 |
1.92 |
2006 |
2.27 |
1.73 |
2005 |
3.33 |
2.63 |