EPA Could Get Tough on Leaded Fuel in Airplanes


FRIDAY, Oct. 7, 2022 — The U.S. Environmental Protection Agency (EPA) has taken a major step to curb the largest remaining source of airborne lead pollution. The agency has proposed a so-called endangerment finding that aircraft that use leaded fuel cause or contribute to pollution that could harm public health and welfare.

A majority of aircraft that use leaded fuel are smaller piston-engine aircraft that carry two to 10 passengers. Commercial jet aircraft do not use leaded fuel.

The proposed endangerment finding is considered a first step in using the EPA’s authority under the Clean Air Act to address this source of lead pollution.

The next step is seeking public notice and comment on the proposed endangerment finding. The EPA will then review those comments and issue a final finding in 2023. The agency is not proposing aircraft engine lead emission standards with this action, but it could propose regulatory standards later. Levels of airborne lead in the United States have declined 99 percent since 1980.

The EPA action is the latest in a series of moves by the U.S. federal government to curb lead pollution. The Biden administration has moved toward safe replacement of leaded aviation gas. Earlier this year, the Federal Aviation Administration (FAA) joined with aviation and energy industries in announcing an initiative to transition piston-engine aircraft to unleaded fuel.

The FAA has approved the safe use of an unleaded fuel that can be used in many piston-engine aircraft as well as other fuels for specific aircraft. Besides jet fuel, lead exposure can come from several sources, including leaded paint, tainted soil, and industrial emissions from battery recycling or metals processing.

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