A crew from the water quality nonprofit Current sets equipment to monitor the bacteria levels in the Chicago River under the DuSable Bridge on May 16, 2025. (E. Jason Wambsgans/Chicago Tribune) ...

Chicago River Day happening Sat May 10. Posted: May 9, 2025 | Last updated: May 9, 2025. Friends of the Chicago River events holding events Saturday May 10 as part of Chicago River Day.

While most of Chicago is well versed in rats, beavers in the Chicago River have become the new animal stars of the area as more people went back to nature during the COVID-19 pandemic.