All Web Water Quality Reports

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.

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 Reports

Annual Report on Infiltration and Inflow (PDF) Demand Management Report - Assurance of Compliance with 436 MGD Flow Limit (PDF) Annual Status of Plant Maintenance (PDF) Outfall Monitoring Overview (PDF)

Boston Harbor Temperature

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

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

Ambient Monitoring Quarterly 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 briefings

Harbor Beach Water Quality

Historical Harbor and River water quality data