CHANCE OF PROPERTY HAVING LEAD:rebrand.ly/leadchance

Before 1940: 50% on the interior, and 80% or more on exterior;
1940 -1950: 30% on interior, and >50% on the exterior;
1950 -1960: <20% on interior, and >30% on exterior;
1960 – 1970: <10%;
1970 – 1978: <5% contain lead paint.