ZIP Code boundaries overlayed with the City of Flint's boundary. Map: Richard Casey Sadler.ZIP Code boundaries overlayed with the City of Flint's boundary. Map: Richard Casey Sadler.

How the ‘Quirky Geography’ of ZIP Codes Obscured Flint’s Lead Problem

Richard Casey Sadler, an assistant professor at Michigan State University discusses how the Michigan Department of Health and Human Services’ reliance on using ZIP Code level data obscured the link between Flint residents and lead exposure.