The Center for Urban Studies (CUS) at Wayne State University has been examining the connections between health and lead poisoning in a number of ways. This latest map shows how the age and potentially quality of housing impacts lead exposure among other health issues (mold, asthma, etc.).
Detroit has the highest percent of homes built before 1980 of all the areas examined. Since Detroit has such a high percentage of older homes (a majority of the Census tracts in Detroit have 86 percent or higher of the homes built before 1980). […] One of the especially interesting features of this map is that much of the younger housing is located in the inner core where housing demolition and replacement has been intense since the 1940s and 1950s. (from the CUS Drawing Detroit blog)