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Tracking California used new analytical methods to discover that the numbers of lead-poisoned children in California and the U.S. may be much higher than previously reported.

How many children in the United States suffer from lead poisoning? Tracking California discovered that the numbers of lead-poisoned children may be much higher than previously reported.


Using new analytical methods, Tracking California estimated that during 1999-2010, most states may have missed more than half of their lead-poisoned children.Nationally, only 64% of lead-poisoned children were identified. In California, only 37% of lead-poisoned children were identified.


The findings suggest that recent lead poisoning estimates that are based solely on clinical data are too low and many lead-poisoned children remain undiagnosed and untreated.  Explore results through our interactive maps of predicted lead exposure and testing rates.