Address: Forest Road 2236
Westfork, MO 64498
County: Reynolds
Pollutant monitored: Lead (Pb)
Date established: Jan. 1, 2010
Site coordinates
* Latitude: 37.46889°
* Longitude: -91.08847°
EPA site number: 29-179-0002

The Fletcher air monitoring station lies near a lead mine as well as a processing mill that turns lead ore into lead concentrate. The Doe Run Co. operates the Fletcher mine and five others along the Viburnum Trend; these six mines constitute Missouri's new lead belt. The state's air monitoring station helps department staff determine public exposure to airborne lead resulting from the mill's operations. The monitoring station lies next to a power substation as shown in this picture. Department staff periodically review the location to ensure that it continues to meet EPA's siting criteria for air monitoring sites. The review includes a survey of the surrounding area to identify nearby sources of air pollution that may affect the station's data.

Lead (Pb) Data*

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.

Preliminary lead data
• Information about 2008 standard and EPA requirements
• Three-month average lead concentrations for the most recent 12 months
• Map of lead monitoring sites

Graph of design values for state-operated sites in the new lead belt, beginning in 2004

Department's webpage about airborne concentrations of lead
• Description, health effects and historical information
• 2008 standard and related documents

Related Links

Missouri map with network of air monitoring sites

2009 Monitoring Network Plan and Missouri Lead Monitoring Network Plan
Describe expansion of monitoring network prompted by EPA requirements issued in 2008

Real-time views from cameras in Kansas City, St. Louis

Department's webpage about air quality
• Air quality forecasts for St. Louis, Kansas City and Springfield during ozone season: March 1 through October 31
• Tips for improving air quality
• Tips for breathing better when air quality is forecasted to be unhealthy for sensitive groups (orange) or unhealthy (red)
• Air quality forecasts for U.S. cities
• Air quality information from EPA

National standards for pollutants

EPA Air Sensor Toolbox for Citizen Scientists