What is the major environmental source of lead exposure in adults?

Lead-based paint is widely recognized as a significant environmental source of lead exposure, especially for adults who may encounter it through various activities such as renovation or demolition of older buildings. Many homes built before 1978 in the United States contained lead-based paint, and the dust or chips from deteriorating paint can become airborne or ingestion-prone, impacting individuals during maintenance or restoration tasks.

In adults, lead exposure can also occur through occupational settings where lead is used in manufacturing or construction, where they may come into contact with lead dust or fumes. This source is critical because lead exposure can lead to serious health issues including neurological effects, cardiovascular problems, and reproductive issues.

Other options like air, water, and food do contribute to lead exposure, but they are not as significant as lead-based paint for adults. Air pollution can contain lead from industrial emissions, and lead can contaminate water, especially in older plumbing systems. However, these sources tend to have lower overall exposure risk compared to the widespread presence and potential for direct contact with lead-based paint. Food may also carry lead, but it is generally less of a concern when determining the major source in adult populations.