MWRA's
sewage treatment system has undergone a nearly complete transformation
under the federally mandated 11-year, $3.8 billion Boston Harbor Project. The
project, which is now complete, included a new sludge-to-fertilizer facility;
the Deer Island Treatment Plant with primary and secondary treatment
capabilities; the Inter-Island Tunnel that tied together two
separate sewer systems (North and South) into one; and 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. |
![Aerial of Deer Island](../graphic/HarborSymposium_sm.jpg)
DEER ISLAND WASTEWATER
TREATMENT PLANT
The centerpiece of MWRA's
Boston Harbor Project |