What Is The PM 2.5 Standard?
What Is The PM 2.5 Standard? Currently, the EPA has primary and secondary standards for PM2.5 (annual average standards with levels of 12.0 μg/m3 and 15.0 μg/m3, respectively; 24-hour standards with 98th percentile forms and levels of 35 μg/m3) and PM10 (24-hour standards with one-expected exceedance forms and levels of 150 μg/m3). What level of