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Sources of Airborne Lead Emissions in the United States

The most recent U.S. EPA inventory (2002) lists 16,600 facilities that emit lead into the nation's air. About 7,000 of these are relatively small, reported to release less than one pound of lead per year. The remaining 9,600 facilities release significant amounts of lead each year, from one pound to more than 10,000 pounds -- the largest being 117,392 pounds from a lead smelter in Missouri. According to the EPA's inventory, sources of airborne lead emissions can be found in every U.S. county. In some counties more than 10,000 pounds of lead are emitted into the air each year. The EPA monitoring stations responsible for testing for lead in the air (marked with stars on the maps) are not located throughout the country and are totally absent from some areas where lead emissions may be the highest.

Sources of Airborne Lead Emissions in the United States[PDF 2MB]
Total Airborne Lead Emissions by United States County[PDF 2MB]
Mapping Methodology