Lead is a metal found naturally in the environment as well as in manufactured products. The major sources of lead emissions have historically been motor vehicles (such as cars and trucks) and industrial sources. As a result of EPA's regulatory efforts to remove lead from motor vehicle gasoline, emissions of lead from the transportation sector dramatically declined by 95 percent between 1980 and 1999, and levels of lead in the air decreased by 94 percent between 1980 and 1999. Today the highest levels of lead in air are usually found near lead smelters. The major sources of lead emissions to the air today are ore and metals processing and leaded aviation gasoline. There are two federal standards for lead but only one is applicable to Oklahoma.

Pollutant Primary/
Secondary
Averaging
Time
Level Form
Lead primary and secondary Rolling 3 month average 0.15 μg/m3 Not to be exceeded


PB Monitoring Sites

The division runs two lead monitoring sites as of 2012. Their methods are identical in that each air sampler pulls air for 24 hours across a glass fiber filter once every 6 days. These samples are then sent to an independent lab for analysis.

*Note that the majority of the values indicated by these monitors are below the minimum detectable limit (MDL). The values that were detected above the MDL are not a health concern.

2013 PB Data

In 2008, the federal government substantially strengthened the national ambient air quality standards for lead. EPA revised the level of the primary, health-based standard from 1.5 μg/m3 to 0.15 μg/m3, measured as total suspended particles (TSP). New monitoring requirements were also promulgated. Monitoring concentrations of lead in Oklahoma are well below the standard.

2013 Savanna Site Pb Values2013 Tulsa Site Pb Values