Low-Level Lead Exposure Linked to Lower Test Scores in Children

A University of Iowa study shows that even minimal lead exposure in early childhood, below current CDC limits, is linked to lower math and reading scores. Researchers analyzed data from students in grades 2 to 11, consistently finding academic declines tied to lead levels once considered safe. They urge policymakers to lower intervention thresholds, stressing no blood lead level is safe for children’s brain development.

Lead remains a common neurotoxin found in old housing, plumbing, and soil. Despite reductions in acceptable lead limits, this study suggests current standards may not fully protect children’s developing brains. Lead exposure can cause lasting cognitive and behavioral problems, especially affecting low-income and minority communities already facing health and educational inequities. Since academic performance strongly influences future opportunities, addressing even low-level lead exposure is critical to protecting children’s health and success.

04-06-2025