After residents of Tonawanda, N.Y., became sick, they rallied to fight high levels of hazardous chemicals emitting from a dilapidated plant. In doing so, they revealed weaknesses in the way the EPA regulates air pollution. Video Credit: John Poole / NPR

Want to know if  plants in your town are a health risk? Zoom in on our interactive map.

Poisoned Places, a four-part series from NPR News Investigations and The Center for Public Integrity.

To begin exploring how air pollution may affect your community, use our snazzy interactive map of more than 17,000 facilities that have emitted hazardous chemicals into the air. Color-coded dots and scores of one to five smoke stacks are based on an EPA method of assessing potential health risk in airborne toxins from a given facility. More smoke stack icons signify higher potential risks to human health. Zoom in to your neighborhood by clicking on the map or use the search box to find the area you’re looking for.

Want to know more? Check out our series, “Poisoned Places.”