Lead is a very strong poison. When a person swallows a lead object or inhales lead dust, some of the poison can stay in the body and cause serious health problems. A single high, toxic dose of lead can cause severe emergency symptoms. However, it is more common for lead poisoning to build up slowly over time. This occurs from repeated exposure to small amounts of lead. In this case, there may not be any obvious symptoms, but the lead can still cause serious health problems over time, such as difficulty sleeping or lowered IQ in children.

Lead is much more harmful to children than adults because it can affect children's developing nerves and brains. The younger the child, the more harmful lead can be. Unborn children are the most vulnerable.

Children get lead in their bodies when they put lead objects in their mouths, especially if they swallow the lead object. They can even get lead poison on their fingers from touching a dusty or peeling lead object, and then putting their fingers in their mouths or eating food afterward. Tiny amounts of lead can also be inhaled.

Testing shows that many children have too much lead in their blood. Overall, about 1 in 20 preschoolers have high levels of lead in their blood. Any child can be affected. Children living in cities or older houses are more likely to have high levels.

Plumbism

Lead used to be very common in gasoline and house paint in the U.S. Although these items are no longer made with lead in them, lead is still a health problem. Lead is everywhere, including dirt, dust, new toys, and old house paint. Unfortunately, you can't see, taste, or smell lead.

Lead is found in:

• House paint before 1978. Even if the paint is not peeling, it can be a problem. Lead paint is very dangerous when it is being stripped or sanded. These actions release fine lead dust into the air. Infants and children living in pre-1960's housing (when paint often contained lead) have the highest risk of lead poisoning. Small children often swallow paint chips or dust from lead-based paint.
• Toys and furniture painted before 1976.
• Painted toys and decorations made outside the U.S.
• Lead bullets, fishing sinkers, curtain weights.
• Plumbing, pipes, faucets. Lead can be found in drinking water in homes whose pipes were connected with lead solder. While new building codes require lead-free solder, lead is still found in some modern faucets.
• Soil contaminated by decades of car exhaust or years of house paint scrapings. Thus, lead is more common in soil near highways and houses.
• Hobbies involving soldering, stained glass, jewelry making, pottery glazing, miniature lead figures (always look at labels).
• Children's paint sets and art supplies (always look at labels).
• Pewter pitchers and dinnerware.
• Storage batteries.

Bleecker ML, et al. Differential effects of lead exposure on components of verbal memory. Occup Environ Med. 2005 Mar;62(3):181-7.

Chen A, Dietrick, KN, Ware, JH, et al.  IQ and Blood Lead from 2 to 7 Years of Age: Are the Effects in Older Children the Residual of High Blood Lead Concentrations in 2-Year-Olds? Environ Health Perspect. 2005 May;113(5):597-601.

Tong S, et al. Environmental Lead Exposure: A Public Health Problem of Global Dimensions. Bull World Health Organ. 2000; 78(9): 1068-77.

Wright RO, et al. Association between iron deficiency and blood lead level in a longitudinal analysis of children followed in an urban primary care clinic. J Pediatr. 2003;142: 9–14.