Thousands of eager spectators, many adorned in festive green attire, converged along the Chicago River on Saturday morning, March 14, 2026, to witness the city’s renowned waterway undergo its annual transformation into a brilliant emerald. The 64th annual dyeing kicked off St. Patrick's Day celebrations, pulling in crowds from all over.
The Grand Transformation Unfolds
The event started at 9:52 a.m. Saturday. Plumbers from Local 130 took boats through downtown. Positioning themselves strategically between Columbus Drive and Orleans Street, they commenced the delicate process of releasing their proprietary dye into the river. What began as the river’s usual gray-green quickly gave way to a stunning, almost iridescent green, a color that seemed to glow under the morning sky.
People crowded every spot to watch. Crowds lined the riverwalks and bridges, phones out to record the moment. The air buzzed with excitement, a prelude to the day’s broader festivities. The green river's become a symbol of Chicago's Irish heritage.
A Tradition Forged in Innovation
The annual dyeing of the Chicago River has been a hallmark of the city’s St. Patrick's Day observance since 1962, a tradition meticulously maintained by the plumbers union. The ingenious idea originated with Stephen Bailey, who served as the union’s business manager in the early 1960s. Bailey, seeking a distinctive way to honor St. Patrick’s Day, drew inspiration from a practical tool of his trade: a special dye used by plumbers to detect leaks in pipes and drainage systems. He thought: why not use that dye to turn the river green?
What started as a quirky idea became world-famous. For over 60 years, the green river's shown up in TV shows and movies. It stands as a testament to the city’s creativity and its ability to turn a simple holiday gesture into a globally celebrated event, eagerly anticipated by residents and tourists alike year after year.
The Secret Behind the Emerald Hue
The plumbers keep the exact dye formula secret. But officials say it's vegetable-based and safe for the river. It only takes about 40 pounds of powdered dye to turn a big stretch of river green.
The plumbers have the process down to a science. Plumbers on boats spray the dye into the river using hoses. Sometimes they use Architecture Tours boats to spray the dye. Other boats follow behind and stir the water to spread the dye evenly. This makes sure the whole section turns the same bright green.
The Ephemeral Beauty of the Green River
Here's something weird about the dye: When they first spray it, the dye comes out orange. Then it reacts with the water and turns green. First-timers are always surprised by the color change.
The bright green lasts a few hours, but the river stays greenish for days. Eventually it fades back to the normal murky color. Sometimes it's stayed green longer depending on weather and water conditions. That's what makes it special—it doesn't last forever.
A City Dressed in Green: Beyond the Waterway
The dyeing of the Chicago River is undeniably the most visually dramatic component of the city’s St. Patrick's Day observances, but it serves as just one highlight in a day replete with celebrations. Chicago goes all-out for St. Patrick's Day with parades and events all over the city. The downtown parade draws hundreds of thousands with floats, bands, and dancers.
Beyond the central business district, the South Side Irish Parade stands out as another major draw. Officials proudly proclaim it to be the largest community-based St. Patrick's Day parade held anywhere outside of Dublin, Ireland, a testament to its deep roots and widespread participation. Additionally, the Northwest Side Irish Parade ensures that the festive spirit permeates various neighborhoods, allowing countless residents to partake in the joyous occasion. These widespread celebrations, from the river’s green glow to the lively parades, underscore Chicago's profound connection to its Irish-American community and its reputation for throwing one of the most memorable St. Patrick's Day parties in the world.
Bringing the Green to Homes Across the Nation
For those unable to brave the downtown crowds or make the trip to Chicago, technology offered a convenient alternative to witness the iconic river dyeing. NBC Chicago provided extensive live coverage of the event, ensuring that viewers could experience the transformation from the comfort of their homes. The live feed commenced at 10 a.m. Saturday, allowing a broad audience to tune in.
The broadcast was readily accessible across various platforms, including NBC 5's dedicated streaming channels and popular services such as Peacock, Roku, and Pluto. This widespread availability meant that people across the nation could participate in the Chicago tradition, watching in real-time as the plumbers union meticulously worked its magic. The entire dyeing process, from the initial orange spray to the full emerald saturation, typically spans about 45 minutes to an hour, providing a comprehensive and engaging viewing experience for the remote audience. This blend of in-person revelry and widespread digital access ensures that Chicago’s unique St. Patrick’s Day kick-off reaches a vast and appreciative audience every year.
With its river now a vibrant green, Chicago officially launched its extensive St. Patrick's Day festivities, continuing a beloved tradition that captivates both locals and a global audience.
