Deer Island
12:00 PM – 4:00 PM
The Massachusetts Water Resources Authority’s (MWRA) Deer Island Sewage Treatment Plant is the centerpiece of MWRA's $3.8 .billion program to protect Boston Harbor against pollution from Metropolitan Boston's sewer systems. The facility is capable of treating an average daily flow of 400 million gallons per day and a peak design flow of 1,270 MGD.
Wastewater "influent" from MWRA customer communities arrives at the plant through four underground tunnels. Pumps then lift the influent about 150 feet to the head of the plant.
A 9.5-mile long, 24-foot-diameter deep rock tunnel outfall transports effluent into the 100-foot deep waters of Massachusetts Bay. Effluent is discharged through more than 50 individual diffuser pipes, each with eight small ports, so that rapid and thorough mixing into surrounding water is achieved and water quality standards
are not compromised by the discharge.
The tour will be offered to the first 50 persons on a first-come first served basis. Government issued photo identification cards (driver’s license, passport, etc.) is required to take the tour. A box lunch will be supplied at the hotel prior to the tour.
The cost of the tour is $50.
