The Ursuline North air monitoring station is located near a shuttered Roman Catholic convent for religious sisters of the Ursuline order. The department has operated this site since 2010, to measure the background concentration of airborne lead upwind of Herculaneum. Until 2013, Doe Run maintained a primary lead smelter in Herculaneum. The facility stopped smelting lead concentrates as per order of 2013 Consent Decree with the EPA. Doe Run now operates a refinery and strip mill as well as alloying and casting operations in Herculaneum.
To learn about other air monitoring sites the department operates as part of the state's ambient air monitoring network, visit Air Monitoring Sites.
Pollutants
Lead
Since 2008, the primary and secondary ambient air standards for lead have remained at 0.15 micrograms per cubic meter (μg/m3). 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 the lead concentration is less than or equal to 0.15 μg/m3 averaged over three months. The standard is not met if the concentration exceeds that level once or more within a three-year period.
- Three-month average lead concentrations for the most recent 12 months
- Map of Missouri's monitor sites for lead in ambient air
- Additional information about Lead State Planning efforts
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