This chart shows the results of Associated Electric Cooperative's investments to improve air
quality. Annual emissions rates of sulfur dioxide and nitrogen oxides are about 90 percent
lower in 2010 compared with 1994 for New Madrid and Thomas Hill coal units.

AECI continues to improve air quality

Associated Electric Cooperative has a strong history of fulfilling its environmental commitments while continuing to meet members’ needs for an economical, reliable power supply. The cooperative has invested more than $1 billion since 1994 to improve air quality, reducing its sulfur dioxide and nitrogen oxides emissions rates nearly 90 percent systemwide.