Chicago River Green Dye Environment

Chicago River Green Dye Environment. The green dye was originally part of the city's effort to clean up the river's waterfront areas, which had long been a depository for chicago's waste. Environmental groups don't dispute the safety of the vegetable dye used in turning the chicago river green for st.

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At least one thing has changed over the years, however: The green dye was originally part of the city's effort to clean up the river's waterfront areas, which had long been a depository for chicago's waste. The chicago river was first dyed green in 1962, to the delight.

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According to the independent, it's been dyed for several years by the chicago plumbers union local 130. Why does chicago dye its river green? To accomplish the dyeing of the river. The tradition of dyeing the river green arose by accident when plumbers used fluorescein dye to trace sources of illegal pollution discharges.