PM 2.5 Information and DocumentsContact: Air Quality Division 517-373-7023Agency: Environmental Quality
Fine particulate matter (PM 2.5) is tiny liquid or solid particles with a diameter less then 2.5 micrometers. PM 2.5 is composed mainly of ammonium sulfate, ammonium nitrate, organic carbon and smaller portions from elemental carbon and soil or crustal elements. PM 2.5 comes from a variety of sources included burning, fugitive dust, and biogenic sources (from plants). PM 2.5 can be emitted directly (primary) or react in the air to form particles (secondary). Respiratory and cardiac problems are directly linked to PM 2.5 exposure. Children, older adults and people with heart or lung diseases are especially susceptible to the health effects from PM 2.5.
Currently, the monitors in the seven counties of Southeast Michigan around Detroit are monitoring attainment the annual and daily PM 2.5 standards. MDEQ is in process of requesting a redesignation of the area to attainment.