PM 10 and PM 2.5 (CAAQMS)
PM 10 and PM 2.5 (CAAQMS) PM10 and PM2.5: Understanding Particulate Matter and Its Impact Particulate matter (PM) refers to tiny particles or droplets in the air that can be harmful to health. The two most commonly discussed categories are PM10 and PM2.5, which differ primarily in size and the associated health risks. PM10 (Particulate Mat