A Look Inside A CSO

Thank you to the Massachusetts Water Resources Authority (MWRA) for an informative tour of what happens when we flush. In Boston, Cambridge, Chelsea, and Somerville, several aging combined-sewer systems bring stormwater & wastewater together. Under dry conditions, wastewater will travel to Deer Island Wastewater Treatment Plant, but in heavy storms, much of this “combined sewage overflow” (or CSO) flows through Prison Point & Cottage Farm, two CSO Treatment Facilities along the Charles, or dumps directly into our rivers. ICYMI read our Boston Globe op-ed on the need to eliminate these sewage releases once and for all.