Lead is a naturally occurring element and, unlike many pollutants, it does not go away over time. This toxic metal was once regularly used in the manufacturing of common household products and gasoline and there is no safe level of exposure to it.

In the past, lead was added to gasoline, paints, water pipes, ceramic glazes, fertilizers and used in many industrial processes. Since the elimination of lead in gasoline and paints in the late 70s, lead pollution in the United States has been reduced. However, the lead that was released through the use of gasoline remains in the environment, especially in the soil near major roadways.

Lead and Indoor Pollution

Old paint found in homes built before 1978 is the most common source of lead air pollution indoors. If left untouched and in good condition, lead-based paint may not be a significant issue to health. However, if it is chipped or deteriorating, paint can create dust, chips, and suspended particles that can be inhaled. Remodeling, dry scraping, and demolition also disturb and re-suspend paint particles.

Contaminated soil and dust tracked indoors from outside are also large contributors to indoor lead pollution. Levels of lead in soil are higher near sources such as lead smelters, mines, old agricultural fields, and heavily trafficked roads and runways. People who work with or around lead must take care to avoid carrying lead particles home on their clothing or equipment.