Illinois Pollution Control Board

The additional rules would build on ones finalized in April and would tackle historic ash fill, temporary storage piles, dust monitors and the way Illinois defines an environmental justice community.

The Illinois Pollution Control Board adopted rules governing how power plants close coal ash ponds that contain toxic waste on Thursday. The new rules require power plant operators to consider a range of options and allow public comments.

Vistra Energy announced Wednesday it is closing its coal burning power plants in Canton, Havana, Hennepin and Coffeen.