Boston Harbor was once known as "the dirtiest harbor in America." How we finally cleaned up the mess with the second-largest wastewater treatment plant in the United States.
In this Travel Channel "Off Limits" clip, Don Wildman explores the depths - and heights - of MWRA's Deer Island Treatment Plant.
For more information about MWRA's sewer system and the Deer Island Treatment Plant, visit: www.mwra.com/03sewer/html/sewh....