Discharge Monitoring
Monthly monitoring results from DITP and Combined Sewer Overflow facilities are summarized in these tables submitted to regulators. (PDF)

Plant Performance Data (PDF)
Most recent data on the DITP effluent discharges.

Annual Status of Plant Maintenance
A report on the implementation of a long-range operations and maintenance plan for the Deer Island Treatment Plant required by the NPDES permit.

Contingency Plan Report on Effluent Monitoring (PDF)
Summary of data on pH, fecal coliform, toxicity, oil and grease, and nitrogen in DITP effluent compared with limits in the Contingency Plan.

Annual Report on Infiltration and Inflow
An update on MWRA's Regional Infiltration/Inflow (I/I) Reduction Plan.

Demand Management Report - Assurance of Compliance with 436 MGD Flow Limit

Harbor and Rivers
Water Quality Report
Sampling crew's reports on Bacteria, algae, and clarity in the harbor & rivers.

Boston Harbor Beaches
Check the water quality at Boston Harbor's beaches

Contingency Plan Report on Ambient Monitoring (PDF)
Monitoring data compared with threshold limits in MWRA's Contingency Plan.

Contingency Plan Threshold Exceedance: August 2011 - Sediment biodiversity (PDF)

Outfall Monitoring Overview (PDF)
After a decade of moving discharges of treated wastewater from the Harbor to Massachusetts Bay, monitoring has shown only limited, localized effects on the Bay, and great improvements in the Harbor.

Bacteria Monitoring at the Outfall
Measurements of fecal coliform and Enterococcus in Massachusetts Bay.

Ambient Monitoring Report  (PDF)
List of ambient monitoring reports published in the last quarter. Includes links to technical reports and other required documents.

Outfall Monitoring Science Advisory Panel meeting on June 30, 2011

Contingency Plan Threshold Exceedance: Red Tide-
corrected results (PDF)
Get more information about Red Tide from the Woods Hole Oceanographic Institution.

Contingency Plan Threshold Exceedance: Red Tide-original notice (PDF).