On February 7, 2024, EPA released its final rule tightening the annual National Ambient Air Quality Standard (“NAAQS”) for fine particulate matter (“PM2.5”), from 12 µg/m3 to 9 µg/m3. EPA’s decision to drop the standard to...more
On April 14, 2020, the Environmental Protection Agency (EPA) proposed to retain the current National Ambient Air Quality Standards (NAAQS) for particulate matter, including both the PM10 and PM2.5 standards. The PM10 and...more