Bear in mind that in the 1960's 60 micrograms per deciliter was considered the top level that was acceptable. Each ten or so years after that, the figure went down and finally to the point that in some places a normal or typical amount for the area is above what is now acceptable. I don't remember anyone here ever being treated for high lead levels even in the 60's but no one I knew ever ate paint flaking off the walls either. People in Missouri typically run around 10 .