| Source | NBC Local |
|---|---|
| Original Load Date | March 14, 2026, 11 a.m. |
| Last Updated | March 14, 2026, 11 a.m. |
| Original URL | https://www.nbcchicago.com/news/local/how-long-does-the-green-dye-last-in-the-chicago-river-heres-what-to-know/3907999/ |
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It’s a big day in the city, as the Chicago River will be dyed green in
celebration of St. Patrick’s Day, but how long will the color last?
Most fans of the tradition know that the dye, which is put into the water by the
Chicago Plumbers union, comes out orange, but once it spreads in the water it
t...