For the Chicago Cubs rally and parade for their 2016 World Series Championship celebrations, the river was dyed Cubs blue. Friends of the Chicago River executive director Margaret Frisbie told the Chicago Sun-Times, "We do not want to set a precedent where, every time we want to celebrate, we dye the river a different color and potentially hurt the aquatic life that lives in it. While it may seem festive, it’s actually potentially harming a natural resource."
