What is a common source of lead in residential environments?

Windows are indeed a common source of lead in residential environments, particularly in homes built before 1978 when the U.S. government banned the use of lead-based paints in residential properties. The primary concern with windows is that they can contain lead-based paint, especially on surfaces such as window frames and sashes. When these painted surfaces deteriorate, they can create lead dust and chips, posing a risk to residents, particularly young children who may ingest or come into contact with lead.

In contrast, while roofing materials and water pipes can also contain lead, the most immediate and widespread risk in homes typically comes from deteriorating painted surfaces such as windows. Painted furniture might be a source in certain situations, but its prevalence is less than that of painted window frames in old homes. This makes windows one of the most significant concerns regarding lead exposure in residential environments.