Structure age is highly correlated with lead exposure risk. According to published reports [1], older homes are more likely to contain lead paint. The likelihood of lead paint is dependent on the age of the structure. Since. Therefore, the age of a structure is related to the probabilities of lead dust presence. And, lead dust is the prevalent contributing factor leading to an increase in blood lead levels [2].

Older Homes are More Likely to Contain Lead-Based Paint

dwelling construction date	percentage of homes containing lead-based paint
before 1939	87%
1940 to 1959	69%
1960 to 1977	24%
1978 or later	7%