WI Tracking provides information about air pollution in Wisconsin. “Air pollution” means substances in the air that should not be there – or should be there in smaller amounts.¹ These unwanted substances might be gases, liquids, or solids.
WI Tracking uses two ways to decide which kinds of air pollution are important to track:
Through federal standards. Many harmful substances have standard levels defined by the United States government.² These substances are known as “criteria air pollutants.” WI Tracking gets information about these pollutants from monitoring stations all over Wisconsin.
From industry reports. If substances are known to cause cancer they are also tracked by the Tracking Program. These substances are known as “carcinogenic emissions.” WI Tracking gets data on these pollutants from industry reports that tell us how much of the substances are discharged into the air.
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To view the data for criteria air pollutants and carcinogenic emissions, follow the links above. For more information about air contaminants, visit the air quality issues page.
¹US Agency for Toxic Substances and Disease Registry
²National Ambient Air Quality Standard set by the United States Environmental Portection Agency (US EPA)