What particulate matter and air toxics research has EPA already conducted?
EPA has a broad program of related research as described on the Particulate Matter Research Web site at http://www.epa.gov/pmresearch/. During the last decade, EPA and its collaborators have conducted a series of human exposure studies investigating particulate matter and selected air toxics. These studies were performed in Baltimore, Maryland; Fresno, California; Research Triangle Park, North Carolina; Atlanta, Georgia; Boston, Massachusetts; New York City, New York; Seattle, Washington; Tampa, Florida; and Los Angeles, California. These studies investigated the magnitude and variability of individual’s personal exposures and the resulting health effects. These studies were somewhat limited in their scope and did not attempt to identify fully the pollutant sources impacting participants. Data from these studies indicate that numerous factors may be responsible for the degree and variability of how air pollutants from local, regional and national sources affect the air individuals brea
