en.wikipedia.org/wiki/Chicago_River

The Chicago River is a system of rivers and canals with a combined length of 156 miles (251 .... The river turns slightly to the south west between Michigan Avenue and State Street ..... Chicago River believes the dye is probably not harmful, they do not oppose ..... "Other cities dye-ing to know what turns Chicago River green".

mentalfloss.com/article/62220/what-do-they-use-dye-chicago-river-green-st-patricks-day

It wouldn't be a St. Patrick's Day celebration in the Windy City without 400,000 spectators crowding the banks of the Chicago River to “ooh” and “aah” at its ...

www.chicagotribune.com/news/chi-chicago-river-green-dye-st-patricks-day-20150312-htmlstory.html

Mar 13, 2018 ... ... explain how they dye the Chicago River green for St. Patrick's Day. ... Day -- unless the holiday falls on a Saturday, which it does this year.

www.thrillist.com/news/nation/chicago-river-green-st-patricks-day

Mar 16, 2018 ... Here's how the Chicago River is dyed green. ... Here's how they pull it off: Recommended Video ... How does Chicago dye the river green?

sustainability.uchicago.edu/about/news/ask_ignacio_green_chicago_river

What do they put in the river to make it turn green for St. Patrick's Day? Whatever it is, it can't be good. -Super King. Who doesn't love seeing an entire body of ...

www.ask.com/youtube?q=How+do+they+turn+the+Chicago+River+green%3F&v=mDFXqfnxf2Q
Mar 17, 2018 ... An annual tradition in Chicago, the Chicago Journeymen Plumbers turn the Chicago River green each year using a secret orange powder that ...

abc7chicago.com/society/how-does-chicago-dye-the-river-green-for-st-patricks-day/3211664

Mar 16, 2018 ... The dyeing is the work of Chicago Plumbers Union Local 130. They use a proprietary dye to turn the Chicago River green. This year will mark ...

www.terrapass.com/st-patricks-day-secrets-environmental-effects-dyeing-chicago-river

They do say that the dye is completely harmless, and major environmental ... -5- things-to-know-about-dyeing-the-chicago-river-green-20150312-story.html.

abcnews.go.com/US/video/timelapse-video-shows-chicago-river-turns-green-st-46087375

Mar 13, 2017 ... The city uses some 45 pounds of "eco-friendly" vegetable dye color the river.