Chicago River Dyed Green 2025 Pdf. Why is chicago's river dyed green? 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.

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. The chicago plumbers union, chicago journeymen plumbers local 130, has been dyeing the chicago river green in honor of the city’s st.