DALLAS – (Feb. 22, 2021) The U.S. Environmental Protection Agency (EPA) recently approved the state of Arkansas’ plan for administering programs related to the National Ambient Air Quality Standards (NAAQS) for ozone.

DALLAS – (Feb. 22, 2021) The U.S. Environmental Protection Agency (EPA) recently approved the state of Arkansas’ plan for administering programs related to the National Ambient Air Quality Standards (NAAQS) for ozone.