[1] KU settled with the Environmental Protection Agency (EPA) in February 2009 for Unit 3 being under violation of the Clear Air Act.

Under the settlement, KU had to install state-of-the-art pollution control technologies to reduce sulfur dioxide (SO2) and nitrogen oxide (NOx) emissions.

[1][3] Stricter environmental rules and energy efficiency outweighed the cost of running the units.

[3] In 2014, the state Public Service Commission authorized the construction of a solar photovoltaic array at the E. W. Brown Generating Station.

The array will be the first utility-scale solar project in the state, and will be capable of providing 10 MW of power alongside the fossil fuel based generators already operating onsite.