Operations & Maintenance

MWRA performs routine maintenance of the sewer system, the sewage treatment plant, and the sludge pelletizing plant in order to protect its assets as well as to comply with permit provisions. MWRA must submit annual status reports on maintenance activities to EPA and DEP, and place this information on this website. MWRA is also required to submit a summary report of all actions taken to reduce infiltration/inflow during the MWRA's past fiscal year. The report includes community wastewater flows and estimated reductions in infiltration and inflow for MWRA service area communities. Government regulators must also be notified when there is an operational incident or upset at an MWRA facility.

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

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.

Combined Sewer Overflow (CSO) postings

Operational Notifications