The Koppers coal tar plant in Cicero has been found in violation of both state and federal environmental laws dating back 50 years — from the late 1970s until this past summer.
A new Illinois EPA list of violations raises new questions about how much cancer-causing chemicals the plant is emitting.
https://www.muckrock.com/news/archives/2023/dec/06/koppers-hazardous-industrial-polluters-cicero/