Annual PM2.5 by Region


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PM 2.5 refers to airborne particles less than 2.5 micrometers in diameter. These microscopic particles can consist of several chemical compounds and are created by combustion sources, such as coal-fired power plants, steel and coke works and motor vehicles. PM 2.5 can travel deep into the lungs and studies have reported long- and short-term exposure to be associated with serious health conditions, including respiratory ailments and cardiovascular disease. Concentrations of PM 2.5 typically are not uniform across a region and can be affected by weather, topography, local and upwind emissions sources and other factors.



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Data Source(s):

U.S. Environmental Protection Agency