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Toxic Legacy: Century-old tar plumes under Lake Superior stir health fears — and a cleanup could be years away

Credit: Kate Golden
Wisconsin Center for Investigative Journalism

Want to know more about “conditionally closed” and other terms here? Here’s a link to DNR’s glossary. And to learn more about any particular site, search for it in this state database of contaminated sites.

The nonprofit Wisconsin Center for Investigative Journalism (www.WisconsinWatch.org) collaborates with Wisconsin Public Radio, Wisconsin Public Television, other news media and the UW-Madison School of Journalism and Mass Communication. All works created, published, posted or disseminated by the Center do not necessarily reflect the views or opinions of UW-Madison or any of its affiliates.

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Kate Golden, multimedia director and reporter, specializes in environmental stories and data visualizations.