Mapping the Harbor's Recovery
THE STATE OF BOSTON HARBOR BEFORE THE BAY OUTFALL STARTED
UP IN SEPTEMBER 2000
As the Boston Harbor Project progressed, monitoring data helped answer the questions of greatest public concern: Is it safe to swim and to eat shellfish? Is the ecosystem healthy, and are aesthetics protected? Changes in bacteria, water clarity, nutrients, dissolved oxygen, toxic contaminants, and other indicators provided a picture of a recovering harbor.
before and after effluent discharge was better treated and then moved out of the harbor, July 1998
was chosen as a turning point, the date the Nut Island Treatment Plant (NITP) was
decommissioned and its flow re-routed to the improved Deer Island Treatment Plant
(DITP). After that date, discharges to the southern harbor ended and most of the wastewater
discharged to the harbor received secondary treatment.