The river is dyed green each year by the Chicago Plumbers Union, Chicago Journeymen Plumbers Local 130, with this year marking their 69th year taking part in the uniquely Chicago tradition. Here's ...

"That's when Mr. Bailey bellowed," the Union declares, "Call the mayor ... we will dye the Chicago River green!" And there you have it. For those who have never seen the process in person ...

While Chicago has asserted that the dye being used is safe, some feel that there are other concerns that may arise from turning the river green. "Dyeing the river perpetuates the notion that it ...