The Chicago River is set to host its first swim in nearly a century on September 21st, marking a major milestone for the city’s revitalization efforts. The event, organized by A Long Swim, aims to raise money for ALS research and will feature Olympians competing in 1- or 2-mile races that pass iconic architectural landmarks.
The river has undergone significant changes since its industrial past, with environmental experts crediting the Clean Water Act of 1972 for restoring it. The city’s efforts to clean up the river have led to a transformation from an open sewer to a playground for tourists and locals alike.
Swimmers will face safety concerns, as water quality readings are monitored at eight points along the course. However, organizers are confident that the river is safe enough for competition, with concentrations of pollutants ranging from 200-600 CCE.
Olympians Olivia Smoliga and Natalie Hinds will compete in the event, which also aims to teach Chicago-area children how to swim. The money raised by the swim goes towards funding medical research labs focused on developing treatments for ALS.
The event marks a significant step forward for ALS research, with A Long Swim’s efforts having contributed to the development of new treatments and partnerships between researchers.
Source: https://eu.usatoday.com/story/news/nation/2025/09/18/chicagos-als-river-swim-century-poop/86165003007