A more stringent standard for airborne lead particles was recently set by the EPA. This new federal lead standard, which cuts the maximum allowable lead concentrations to a tenth of the old standard, is the first change in nearly three decades. The new lead standard is at 0.15 micrograms per cubic meter of air, which is down from 1.5 micrograms. The cleanup of excessive lead areas, however, is not required for another eight years.

Link To New York Times article.