EPA Responds to Recommendations for Lead Nonattainment
On June 15, 2011 the Environmental Protection Agency (EPA) sent letters to state and tribal representatives responding to their recommendations on which areas would not meet the National Ambient Air Quality Standards (NAAQS) for lead. The letters indicate either agreement with the recommendations, or EPA's intent to modify those recommendations.
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 piston-engine aircraft operating on leaded aviation gasoline. For ...