Seen this today.
"State reviewing use of DuPage River’s public use after complaint about tubing company"
https://www.chicagotribune.com/suburbs/naperville-sun/ct-nvs-dupage-river-public-private-st-0711-20210710-h425h5z7tbaljpcsxnyrlnd4iy-story.html
That looks heartbreaking and disgusting, as Andy said.
I hope you do call some of the authorities and can get some action, or the very least explanations.