Childhood lead poisoning: the torturous path from science to policy
J. Clin. Invest. David C. Bellinger, et al. 116:853 doi:10.1172/JCI28232 [Go to this article.]

Figure 2
Change in the definition of elevated blood lead level (μg/dl) over time. The CDC guideline as to what is considered to be an undue level of lead absorption has continued to decrease over the latter half of the twentieth century. Figure based on data reported in refs. 8, 10-12.