2014 Air Data Report

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/
Level Form
Lead primary and secondary Rolling 3 month average 0.15 μg/m3 Not to be exceeded

Pb Monitoring Sites

This year the division received a waiver to remove the Savanna lead monitoring site because monitored levels were well below the standard. Lead is now monitored at the Peoria site in Tulsa. To monitor lead, an air sampler pulls air for 24 hours across a glass fiber filter once every 6 days. The samples are sent to an independent lab for analysis.

*Note that most of the monitored values are below the minimum detectable limit (MDL). The monitored values above the MDL are not a health concern.

2014 Pb Data

Primary/Secondary Lead Standard = 0.15 μg/m3

In 2008, the federal government substantially strengthened the national ambient air quality standards for lead. The level of the primary, health-based standard was revised 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.

2014 Tulsa Site Lead Values