Lead: IQ Alert, c. 2002


IQ Alert: Lead in Children’s Blood


Color-coded map shows mean blood lead level (measured in micrograms per decilitre) in urban children by WHO sub-region in 2002 or later. Blood lead levels above 10 mg/dl may have serious consequences in children’s learning.

Legend indicates:

  • Dark Blue: Over 15.0
  • Violet: 10.1-15.0
  • Purple: 5.1-10.0
  • Pink: 5.0 and under
  • Light Brown: no data

A more detailed version of this map:


Inheriting the World: The Atlas of Children’s Health and the Environment, Part Two: Global Environmental Issues. By Bruce Gordon, Richard Mackay and Eva Rehfuess, World Health Organization, 2004.
ISBN 92 4 159156 0.


© WHO 2004. All rights reserved.


This map is one in a series: