Source: https://www.agc.org/, February 2, 2023

The U.S. Environmental Protection Agency (EPA)  has reconsidered the 2020 determination that retained the national ambient air quality standards (NAAQS) for particulate matter (PM) and has proposed to tighten the primary annual PM2.5 standard outside of the normal five-year framework for these changes. AGC closely monitors and weighs in on these rulemakings as they may include stricter requirements and/or restrictions on diesel engines and their use. If an area of the country does not meet the standards, then the federal government can introduce sanctions such as caps on development and the loss of federal funding for highway projects. Read more.