PM10 refers to particulate matter 10 micrometers or smaller in diameter, small enough to be inhaled into the respiratory system. PM10 includes dust, pollen, and particles from combustion and industrial processes. While larger than the more dangerous PM2.5, PM10 can still cause respiratory irritation and aggravate conditions like asthma. Air quality monitoring measures PM10 concentrations as part of overall air quality assessment. Municipal actions affecting PM10 include road dust control, construction site management, and emission regulations. Air quality advisories may warn residents with respiratory conditions when PM10 or other pollutant levels are elevated, recommending reduced outdoor activity.