Lead poisoning is most commonly associated with children living in homes built before which year?

Lead poisoning is most commonly associated with children living in homes built before 1970 because this timeframe corresponds with the widespread use of lead-based paints in residential construction. Lead was commonly used in house paints until regulations began to restrict its use in the late 1970s. Homes built before 1970 are significantly more likely to contain lead-based paint, which poses a risk, especially to young children who may ingest lead dust or particles through normal hand-to-mouth activities.

During this period, lead was also used in plumbing and other construction materials, contributing to exposure. The higher prevalence of lead in these older homes is a well-documented concern in public health, which is why identifying homes built before 1970 is critical for lead poisoning prevention efforts. Since awareness and regulations regarding lead began to appear in the 1970s, homes built after this time are generally less of a risk for lead exposure.