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Timeline of lead poisoning prevention policies and blood lead levels in U.S. children, 1971-2008

Timeline of lead poisoning prevention policies and blood lead levels in children aged 1 to 5 years, by year -- National Health and Nutrition Examination Survey, United States, 1971-2008. Abbreviations: BLL = blood lead level; GM = geometric mean; NHANES = National Health and Nutrition Examination Survey. The bars in the chart for BLL and GM represent estimated values at different NHANES survey periods. National estimates for GM BLLs and prevalence of BLLs 10 µg/dL or higher, by NHANES survey period and sample size of children aged 1 to 5 years: 1976-1980: N = 2,372; 1988–1991: N = 2,232; 1991-1994: N = 2,392; 1999-2000: N = 723; 2001-2002: N = 898; 2003-2004: N = 911; 2005-2006: N = 968; 2007-2008: N = 817. (From: Brown MJ, Margolis S. Lead in drinking water and human blood levels in the United States. MMWR Surveill Summ 2012;61 Suppl:1-9. Public domain.)

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