According to the story, the dye used to detect leaks in the sewer system along the Chicago River turned the water green, and the idea was born to dye the river green in honor of St. Patrick’s Day.

According to the story, the dye used to detect leaks in the sewer system along the Chicago River turned the water green, and the idea was born to dye the river green in honor of St. Patrick’s Day.

CHICAGO (WLS) -- The State Street bridge over the Chicago River will close later this month and will remain closed for months. The Chicago Department of Transportation said the bridge needs ...

Friends of the Chicago River annually question why the river is ... process under the National Pollutant Discharge Elimination System permit program, which Friends has advocated for in accordance ...