Chicago River Green: Downtown crowds watch St. Patrick’s Day 2026 dyeing begin
Chicago River Green was officially underway Saturday morning in Downtown Chicago as the annual St. Patrick’s Day tradition returned and drew thousands to the riverbanks. Journeymen Plumbers Local Union 130 began pouring its proprietary, vegetable-based dye into the main branch, turning the river from murky to bright green. The dyeing started at 9: 52 a. m. ET, as spectators lined stretches of the river to watch the color spread for the days ahead.
How the river turned green Saturday morning
The river dyeing began between Columbus Drive and Orleans Street, with members of Journeymen Plumbers Local Union 130 dumping a closely guarded blend of dyes into the water. The effect is expected to last for several days, and organizers say it takes roughly 40 pounds of powdered dye to create the signature look.
The dye is spread from motorboats and shot into the river by hoses aboard Architecture Tours boats, with other boats following to stir and help distribute the color through the main branch. By mid-morning, large crowds had gathered Downtown, lining the river from Columbus Drive toward the far end of the main branch to catch the moment the water shifts to bright green.
Reactions from officials and attendees as Chicago River Green unfolds
Chicago’s Office of Emergency Management and Communications said the Chicago Police Department will have an increased presence at St. Patrick’s Day events across the city this weekend. The heightened posture comes as multiple celebrations play out over Saturday and Sunday, including the city’s central parade and neighborhood events.
For some visitors, the river dyeing is a must-see stop in a packed weekend. Trisha Jeffcoat, a Baltimore, Maryland transplant attending events, described her run of celebrations after seeing the dyeing and the parade. “We did the dyeing of the river yesterday, and the parade down there, and then I just had to do this one. That was great yesterday. We have high hopes for this one, ” Jeffcoat said, speaking as crowds also gathered for South Side festivities.
In Beverly, where another major parade drew thousands on Sunday, longtime attendees emphasized the neighborhood atmosphere. “The atmosphere is just amazing, and we love to be around the cops and the people, and we wouldn’t have any other way, ” parade-goer Deanne O’Neill said.
Quick context: a long-running union tradition tied to St. Patrick’s Day
This is the 64rd year local plumbers have turned the Chicago River green, a tradition the union has led since 1962. The idea was spawned by Stephen Bailey, the union’s business manager in the early 1960s, who saw a dye used to trace building leaks as a way to celebrate St. Patrick’s Day.
What’s next for the weekend celebrations
Saturday’s festivities also included the 71st annual Chicago Saint Patrick’s Day Parade along Columbus Drive between Monroe Street and Balbo Drive, with a 2026 theme described as “Faith, Peace, & Unity, ” inspired by Pope Leo XIV. City officials also announced a closure of the Chicago Riverwalk from 11 p. m. Friday until 6 a. m. Sunday (all times ET), as crowds continue to move through the downtown corridor.
With the dye expected to hold for days, the next developments will be crowd management and continued public safety operations as the weekend’s St. Patrick’s Day events continue. For now, chicago river green remains the defining visual of the celebration—drawing onlookers back to the river’s edge as the color settles in and the city’s parades press on.
