Massachusetts Water Resources

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The Massachusetts Water Resources Authority is a public authority that provides wholesale water and sewer services to more than 2.5 million people and over 5,500 large industrial users in nearly 60 metropolitan Boston communities. Founded in 1984 by an act of the legislature, the authority s sewage treatment system includes a sludge-to-fertilizer facility, the Deer Island Treatment Plant with primary and secondary treatment capabilities and the Inter-Island tunnel. Its Inter-Island tunnel ties together two separate sewer systems, including the northern and southern part into one. Additionally, the Massachusetts Water Resources Authority includes the 9.5-mile Effluent Outfall tunnel to discharge treated wastewater away from shallow Boston harbor waters and into the deeper waters and stronger currents of Massachusetts Bay.