MassDEP’s Interactive CSO Map

https://mass-eoeea.maps.arcgis.com/apps/webappviewer/index.html?id=08c0019270254f0095a0806b155abcde

The Massachusetts Department of Environmental Protection’s GIS map is a resource that displays information about all Combined Sewer Overflows (CSOs) throughout the Commonwealth. Each CSO is marked with a link to a pop-up window that displays a wealth information, including: the National Pollutant Discharge Elimination System (NPDES) permit ID, the system that it belongs to (Cambridge, Somerville, or the MWRA), the CSO ID, the location, and a link to the permit which allows for the legal discharge of sewage contaminated water into the receiving water body.

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