January 12, 2005—The latest numbers from the Environmental Protection Agency (EPA) show that levels of fine particle pollution, also known as PM 2.5, were the lowest in 2003 since nationwide monitoring began in 1999. The improved air quality can be largely attributed to EPA’s Acid Rain Program, along with other programs that reduced emissions that contribute to fine particle formation. “The Particle Pollution Report: Current Understanding of Air Quality and Emissions through 2003” is available from EPA.
