Boston Harbor and Massachusetts Bay
MWRA Environmental Quality Department

Local Limits

MWRA regulates discharges from certain business or industrial sewer users and prescribes standards and limits for both the quantity and quality of substances that may be discharged. The permit requires MWRA to develop and enforce these limits to prevent pollutants from being introduced into the system that could interfere with the operation or performance of the works, or cause problems with NPDES compliance or sludge disposal practices. This site contains analyses of these limits and any proposed changes in the limits.

Local Limits Reports:

Analysis of Industrial Pretreatment Local Limits and Proposed Revisions

NPDES Compliance Summary Report