Water samples collected at homes near a suburban medical sterilization plant linked to a cancer-causing gas showed no signs of contamination, environmental regulators announced Wednesday.

A group of state attorneys general, including Lisa Madigan, is demanding that the EPA withdraw its plan to delay a regulation aimed at reducing emissions of methane and other pollutants from landfills.

The advocacy group Moms Clean Air Force warns that a Trump administration proposal to weaken standards for emissions of toxic mercury would harm residents and wildlife across Illinois. 

The Trump administration’s plan to roll back limits on toxic mercury pollution will harm Great Lakes fish – and potentially those who eat them, advocates say.

After finding high levels of brain-damaging manganese near Watco Transloading’s facility on the Southeast Side of Chicago, the EPA has accused the company of violating the Clean Air Act. 

Watco Transloading faces up to $20,000 in city fines for failing to control emissions of brain-damaging manganese from its storage facility along the Calumet River. 

Water testing at homes in suburban Willowbrook is the latest step in the response to concerns over the release of dangerous ethylene oxide gas by Sterigenics International. 

As regulators continue to monitor manganese emissions at S.H. Bell Co., new air monitoring data shows alarming levels of the brain-damaging heavy metal near another industrial facility in the area.

The Trump administration is taking another swing at coal regulations, announcing that it plans to ditch an Obama-era rule that set pollution limits for new coal-fired power plants.

After reports of a dangerous gas being emitted from several suburban industrial sites, U.S. Sen. Tammy Duckworth and other lawmakers have introduced a bill that would force the EPA to more quickly disclose similar public health risks. 

A new analysis shows that closing Chicago's final two vehicle emissions testing facilities came at a cost to hundreds of thousands of city drivers, with the biggest impact on low-income and minority drivers. 

The ongoing probe into harmful levels of brain-damaging manganese on Chicago’s Southeast Side has turned up another, more familiar neurotoxin: lead.

A Bensenville-based home renovation company has agreed to pay nearly $53,000 for alleged violations of federal laws designed to protect against exposure to lead-based paint. 

Soil samples have been collected from more than 100 properties as the U.S. Environmental Protection Agency continues to assess the threat posed by brain-damaging manganese emitted from nearby industrial sites.

Local public health experts are set to testify at a Chicago hearing next week on the Trump administration’s proposal to repeal the Clean Power Plan, which established limits on pollution from power plants. 

A new federal grant aims to help educators use the Chicago River as a “living classroom” to teach students about water quality issues.