It’s no secret lead exposure is dangerous. Even low levels can affect a child’s brain.
It’s also no secret that airports are one of the last remaining sources of airborne lead in the U.S.
The U.S. Environmental Protection Agency attests to both these facts.
And yet, the EPA has yet to declare an “endangerment finding” for leaded aviation fuel. That means it hasn’t said whether those emissions pose enough of a threat to public health or welfare to trigger the long and complex process of regulating them.