Elevated blood lead levels in Delaware

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Why This Indicator Matters

Building and sustaining healthy environments is one of government’s core responsibilities to its citizens. All children deserve such environments, no matter where they live, learn and play in our state. The amount of children with elevated blood lead levels (EBLLs) has dropped significantly in the past several decades. Despite this extraordinary success, disparities persist as certain vulnerable populations- like children living below the federal poverty level, children living in older housing, non-Hispanic blacks, Mexican Americans, immigrants, and refugees- are disproportionately affected.

Lead is a toxin formerly found in gasoline, paint and other household items. While lead is much less commonly found in home and work environments, lead poisoning still presents a major health concern and requires careful vigilance to prevent, because lead can't been seen, tasted or smelled. Exposure to lead can result in reduced IQ, learning disabilities, Attention Deficit Hyperactivity Disorder (ADHD), behavioral problems, stunted growth, impaired hearing, kidney damage, mental development delays, comas and even death. Lead poisoning can affect anyone, but children are affected the most due to vulnerabilities in their developing brains and bodies. In 2012, the CDC updated its EBLL reference value to 5 micrograms per deciliter (µg/dL) based on continuing research which has led to a better understanding of poor health outcomes in children due to this environmental toxin. 

The best way to reduce childhood lead poisoning is by focusing on primary prevention, which entails removing lead hazards from the environment before a child is exposed. Early identification is a second-best strategy to reducing impact of environmental lead contaminants to children’s health. Health departments accomplish this using blood lead screening tests. In 1995, the Delaware General Assembly passed the Childhood Lead Poisoning Prevention Act which mandates lead screening at or around 12 months of age and expanded the formal screening process in 2010 so that children at high risk for lead exposure can receive additional testing at 24 months of age. However, it is estimated that less than 50% of Delaware children are tested for lead in their early years. To minimize the adverse effects of lead poisoning, it is essential that testing rates increase so no child is left undiagnosed and any child with an EBLL is treated early. 

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Data Provided By

Definitions: Total children under age 72 months with blood lead levels at or exceeding 5 µg/dL in an 8-year period

Data Source: Delaware Department of Health and Social Services, Division of Public Health, Childhood Lead Poisoning Prevention Program


S = data has been suppressed in zip codes with less than 10 children with high lead levels. The Delaware Department of Public Health follows the CDC guidelines for suppressing counts less than 10 to avoid the risk of identification. Data can be linked up with other name sources or other database which can lead to identification of an individual. Another concern with presenting small numbers in a dataset is the stability of statistical measures.

Last updated: 6/2019