The department established the Ursuline North air monitoring station to measure the background concentration of airborne lead upwind of Herculaneum. Until 2013, the Doe Run Co. operated a primary lead smelter in Herculaneum, and today in Herculaneum, Doe Run operates a refinery and strip mill as well as alloying and casting operations. The state of Missouri has operated this air monitoring site since 2010; it's located near a shuttered Roman Catholic convent for religious sisters of the Ursuline order.
Pollutants
Lead
The primary and secondary ambient air standards for lead have remained at 0.15 micrograms per cubic meter since 2008. The primary standard reflects EPA's concern for public health while the second standard demonstrates concern for public welfare. EPA bases the standard on the highest rolling three-month average over a period of three years and two months. A monitoring site meets the standard when this rolling three-month average is less than or equal to 0.15 μg/m3.
Departmental information about lead
- Health effects
- Missouri's lead legacy
- 2008 standard and pertinent documents
- Three-month average lead concentrations for the most recent 12 months
- State map with monitors for lead in ambient air
Technical issues can affect ability to deliver quality data. Access a table of symbols with explanation of the problems they represent.
210 Glennon Heights Road
Crystal City, MO 63019
United States
Air Pollution Control Program
Division of Environmental Quality
P.O. Box 176
Jefferson City, MO 65102-0176
United States