NPR and the Center for Public Integrity have teamed up for a series of this stories this week about facilities that emit toxic chemicals. One part of the package is this interactive map, which plots more than 13,000 regulated facilities across the country — and also colors the dots based on the potential risk to people living around them: 

See a larger interactive version of the map, which was created with Development Seed’s TileMill application and hosted on its MapBox service.