A Chicago neighborhood once permeated with black dust from uncovered piles of petroleum coke now faces another toxic pollutant, but one that is not as visible or widespread.

Environmental Protection Agency chief Scott Pruitt said he does not believe in “regulation through litigation,” but his stance appears to be subject to change.

Chicago researchers are looking for lead, manganese and other metals that could affect lung function in children with asthma. 

The Illinois senator is calling on federal environmental and public health regulators to conduct a new assessment of toxic pollutants in one of the city’s most industrialized areas.

A coalition of attorneys general and the city of Chicago is prepared to challenge the Trump administration’s environmental policies in court.

Newly released data from air monitors on Chicago’s Southeast Side shows higher levels of manganese than previously recorded, prompting renewed calls for a ban of the toxic metal, which can cause nervous system damage at high exposures. 

A new $450,000 federal grant program partners CPS students with university professors to study the impact of toxic metals on Chicago neighborhoods. 

Chicago elected officials and environmental leaders react to President Trump's decision to withdraw the U.S. from the Paris climate accord. 

A company on the West Side of Chicago has been cited for improperly storing chemicals and threatening public health, according to a suit filed by Illinois Attorney General Lisa Madigan.

An announcement last month from the EPA prompts Chicago to launch its own website dedicated to the science behind climate change.

Organizers of a clean water summit in Chicago next week hope to draft a plan for replacing the city's nearly 400,000 lead water pipes. 

A new report shows that in 2015, Illinois ranked among the five worst states in terms of largest populations served by water systems with health violations. 

Illinois Attorney General Lisa Madigan joined a group of 16 attorneys general last week in urging Congress to reject the rollback of standards that combat pollution and protect air quality.

About 100 East Chicago residents and activists rallied and marched Wednesday while EPA head Scott Pruitt visited the city's lead-contaminated neighborhoods.

The head of the Environmental Protection Agency told residents in East Chicago on Wednesday that the agency had no plans to close its Chicago office. 

A spill last week at a U.S. Steel site in Northwest Indiana released an unknown amount of a potentially carcinogenic chemical into a Lake Michigan tributary, prompting the closure of three beaches at Indiana Dunes National Lakeshore.