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.

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.

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, ...

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.

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 ...

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.

After the river dyeing, the Chicago St. Patrick’s Day Parade, in its 70th year, will start downtown around noon. The parade will head north from Columbus Drive and Balbo.

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.

One of the city’s favorite traditions is the dyeing of the Chicago River in honor of St. Patrick’s Day.The dyeing always occurs the Saturday before the holiday (except when March 17 falls on a ...

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.