The Chicago Plumbers Union, Chicago Journeymen Plumbers Local 130, says its been dyeing the Chicago River green in honor of the city's St. Patrick's Day celebrations for nearly 68 years.

For more than 60 years, Chicago has turned its downtown river green to celebrate St. Patrick's Day. The annual tradition actually has its roots in a big problem for the city: sewage.

The plumbers union, Choose Chicago says, "still holds the river-dyeing honors today." But you won't be able to find their recipe anywhere. There is one thing the city does say about the dye, however.

It’s a Chicago tradition: On Saturday, a stretch of river that slices through downtown will turn greener than the frat-boy vomit on Wacker Drive. Here are five things to know about the Chicago ...

Chicago will once again go all out for St. Patrick’s Day this year with one of the city’s most iconic traditions: The 2025 Chicago River Dyeing. The Chicago River Dyeing for 2025 is scheduled ...

The tradition of dyeing the Chicago River green for St. Patrick's Day dates back to 1962. The annual event was canceled in 2020 as the height of the COVID-19 pandemic began, ...

The annual Chicago River dyeing will turn waters green for St. Patrick’s Day this weekend, but what time will it start and how long will it last? The iconic tradition is set to take place ...

Chicago’s river-dyeing tradition began in 1962, though the exact genesis of the idea is a bit murky. Most versions lead back to the sponsor of the St. Patrick’s Day parade — the Plumbers Union.

What is used to dye the Chicago River green? The exact formula is a secret, but it’s an orange-red, vegetable-based powder. Photograph: Neal O'Bryan Photograph: Max Herman Photograph: Max Herman.

The dyeing of the river for St. Patrick’s Day drew an eclectic crowd to downtown Chicago on Saturday. Nadine Freiheit, 52, drove from her home in Mazeppa, Minnesota, for the revelry.

The Chicago River was running bright green on Saturday, as it does every St. Patrick's Day weekend. Thankfully, the high winds in the forecast died down as the dye went into the water ahead of the ...

Pigeons fly above the dyeing of the Chicago River on March 12, 2022. (John J. Kim/Chicago Tribune) Advocates say the Chicago River is healthier now than it has been in the past 150 years.