On April 20, 2010, the U.S. Environmental Protection Agency (U.S. EPA) Administrator Lisa Jackson signed an Advanced Notice of Proposed Rulemaking (ANPRM) on lead emissions from piston-engine aircraft. Through it, EPA is seeking public comment on a range of issues relating to leaded aviation gasoline, including calculation of lead emissions and fuel-distribution systems. The ANPRM could lead to proposed rules regulating the emissions of lead from aircraft. Public comments will be due 60 days from publication in the Federal Register. The ANPRM contains a good survey of available information on lead monitoring near airports (air and soil), modeling results, and exposure. This information will provide focus and information on the issue of lead exposures from avgas to the general public and press, to which airports may need to respond.