Area Source
Updated: September 3, 2024Across the U.S. and in Colorado, an emission source that is inventoried on a county basis rather than as a geolocated point source. Area sources are not required to hold a permit from the Air Pollution Control Division permit nor report emissions to the Air Pollution Emission Notice (APEN) system. Area sources are totaled by the APCD and EPA on a county basis and assigned a factor to estimate emissions. These emissions include a wide variety of different air pollutants. Examples of area sources include lawn mowers, and barbecue grills.