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.