The Chicago River was once so polluted by sewage and ... hard on engineering and infrastructure to mitigate flooding and sewer overflows. Many places in Chicago area low-lying areas that are ...

pumping stations might redirect the untreated wastewater and stormwater directly into the Chicago River to prevent flooding—an event called a combined sewage overflow (CSO). During a few days of ...

With changing weather, meaning more extreme weather and more rain events, sewer overflows present a unique issue for the Chicago River. When heavy rains overwhelm the Chicago area's combined sewer ...

The Chicago River, one of four traditional portages ... to a series of new tunnels 250 feet below the river that carry sewage overflow and storm water to a treatment plant. Gallagher dismissed ...

Combined sewer overflows can lead to the release of untreated or partially treated wastewater into the river system. "In most of the Chicago area, rainwater goes through the same set of pipes as ...