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The Commission owns and operates a system for the collection and transport of
wastewater and storm drainage in the City of Boston. The Boston Main
Interceptor and the East Side Interceptor serve the sewer needs of downtown
Boston, the South End, Roxbury, Dorchester and South Boston.
 Other
collection facilities provide sewer services to different parts of the City.
With the exception of several small sections served
by combined sewers, separate sanitary sewers and storm drains serve most of
Allston and Brighton. Charlestown is served by a separated system, except for
one small section. East Boston, Dorchester, South Boston and Roxbury are served
mainly by combined systems. The South End has been partially separated under a
program initiated by the City’s urban renewal program and carried on by the
Commission where feasible and cost effective.
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Roslindale, West Roxbury, Hyde
Park, Mattapan and portions of Dorchester and Jamaica Plain, all of which are
located in the southwestern part of the City, are essentially served by separate
systems which were installed between 30 and 80 years ago.
The remainder of the sewer system consists
of
conduits ranging in size from six-inch clay lateral sewers to 20 foot by 15 ½
foot concrete culverts. The sewer system is comprised of approximately 1,450
linear miles of sewers and storm drains, including 600 miles of sanitary sewers,
550 miles of storm drains and 300 miles of combined sewers. Other facilities
include eight pumping stations, two gatehouses, 40 permitted combined sewer
overflow outlets (CSOs),
185
regulators and 200
tide gates.
All wastewater collected by Commission facilities is conveyed to
the MWRA’s Deer Island Treatment Facility. |
