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| Charles River Projects |
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| The Charles River: A national model for CSO Control The MWRA has achieved significant reductions of CSO-related impacts to the Charles River with a combination of sewer separation, storage, treatment and hydraulic relief projects. As a result, much more flow is now sent to MWRA's new Deer Island Treatment Plant. Upgrades to Cottage Farm and Prison Point facilities have improved disinfection of the remaining CSO flows. Although sewer separation projects in Boston and Cambridge have increased natural stormwater flows into the River, municipalities have implemented Best Management Practices to improve stormwater quality. Sewer separation and hydraulic relief projects have dramatically reduced combined sewer overflows. In its Annual Report Card, the U.S. EPA has rated the Charles River a "B" since 1999, up from a "D" in 1995. This means that the river is acceptable for swimming and boating for most of the year. And water quality in the river continues to improve. MWRA will employ the same combination of sewer separation, storage and treatment to reduce combined sewer overflows in the Fort Point Channel. |
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