AEP has made, and continues to make, significant long-term investments in environmental controls to reduce the impact of how we generate electricity. Between 2000 and 2018, AEP invested approximately $9 billion in environmental controls that are primarily related to the Clean Air Act and have significantly reduced emissions. Since 1990, AEP reduced its annual emissions of sulfur dioxide (SO2) and nitrogen oxide (NOx) by approximately 96 percent and 92 percent, respectively. Since 2001, AEP reduced its annual mercury emissions by approximately 95 percent.
In 2018, the Indiana Utility Regulatory Commission approved Indiana Michigan Power Company’s (I&M) plan to install selective catalytic reduction (SCR) technology on the second of two units at the Rockport Plant. The $274 million SCR project will reduce nitrogen oxides (NOx), adding another form of clean-coal technology to the plant. The SCR project follows the installation of Dry Sorbent injection technology, which was added to both Rockport units to reduce sulfur dioxide (SO2) emissions. The project is scheduled to go into service in the spring of 2020.
Additional information about mercury is located within the Toxics Release Inventory program. Read more information about carbon emissions.