The four groups of chemicals that trigger consumption advisories — PCBs, mercury, dioxins and PFOS (perfluorooctane sulfate) — have all been associated with endocrine disruption.

Emails from the Wisconsin Department of Natural Resources and the U.S. Environmental Protection Agency.

More about nonylphenol and BPA, two chemicals commonly found in Minnesota’s waters.

LOSING TRACK
Main story: Lost signals, disconnected lives
About this project
Thirteen offenders told the Wisconsin Center for Investigative Journalism that Wisconsin’s GPS tracking system repeatedly fails, registering false alerts and landing the offenders in jail although they had done nothing wrong. Meanwhile, Gov. Scott Walker is proposing an expansion of nearly 50 percent in the number of [...]

How can Wisconsin’s electronic monitoring using GPS devices be made more reliable and effective? Suggestions drawn from interviews with experts.

Competing studies are under way to assess air pollution from Wisconsin’s frac sand industry, and the author of one said current state law isn’t protecting people well enough. A separate study, meanwhile, will examine the impact of frac sand mines on water.

A brief run-down of the permits required to open a frac sand mine or processing plant.

Since 1986, at least 297 personal injury, wrongful death and medical malpractice lawsuits have been filed against Wisconsin nursing homes and other long-term care facilities, according to an analysis by the Wisconsin Center for Investigative Journalism.