Residents in several North Side neighborhoods reported a foul stench on Tuesday, described by some as “skunk”-like but mostly sewage.

After a successful inaugural event in 2025, the Chicago River Swim is coming back in September, officials announced.

Birders inadvertently provided researchers at Loyola University with a key bit of documentation related to invasive species and microplastics.

The Chicago Fire has committed to enhanced bird protections for its proposed new stadium. Does this represent a tipping point for bird-friendly design in Chicago?

It's been 125 years since the Chicago River was famously reversed by creating the 28-mile Chicago Sanitary and Ship Canal. Voting is open to give the canal a new, less sewage-adjacent name.

The Chicago River has proven itself fit for swimming. But what about raising a family? No one’s ever tallied the number of larval fish in the waterway, until now.

The Chicago River Swim is an open water swim event organized by Douglas McConnell, the co-founder of A Long River Swim, which organizes open water swimming events to raise awareness and funds in the fight against ALS.

The event will mark the first open water swim in the Chicago River in nearly 100 years, according to organizers.

Two weeks after announcing a plan to build a privately funded $650 million stadium on the South Branch of the Chicago River, the Chicago Fire has released new renderings of the proposed arena.

Illinois Attorney General Kwame Raoul has announced a $4.8 million settlement with Trump International Hotel & Tower in Chicago, resolving environmental violations related to the building’s cooling system, which uses water drawn from the Chicago River.

We asked experts what to do when you see something in the Chicago River that doesn’t belong there.

A new notification system is being proposed at access points along the Chicago River to warn recreational users when untreated wastewater has entered the waterway.

The decades-old St. Patrick's Day tradition routinely attracts tens of thousands of revelers to the riverfront, but in recent years it's also attracted criticism from environmentalists.

In just a handful of decades, the rusty crayfish has become dominant in the Great Lakes. Join us on a deep dive into this elusive invader.

The Trump International Hotel and Tower has been found in violation of the Illinois Environmental Protection Act and deemed a “public nuisance” to the Chicago River.

Organizers of the Chicago River Swim have taken the city’s suggestion and will hold the open-water swim event in Lake Michigan on Sept. 22, with the goal of proving themselves for a 2025 plunge in the river.