It's shameful the EPA still hasn't banned leaded aviation fuel.
https://sanjosespotlight.com/san-jose-airport-lead-levels-ar...
Although the absolute risk is probably small the aviation industry should have moved faster on this issue. Airplanes last longer than cars but they can't expect the status quo to be tolerated indefinitely. At some point airplane owners need to be forced to upgrade their engines, or quit flying.