Integrated Lists of Waters & Related Reports

Proposed and approved lists of impaired water bodies in Massachusetts.

The federal Clean Water Act requires states to submit reports on the status of their water bodies every 2 years. These reports are called "Integrated Lists of Waters" (ILW). After a public comment period, MassDEP submits these reports to the US Environmental Protection Agency in fulfillment of the Clean Water Act's reporting requirements. MassDEP uses these reports to develop Total Maximum Daily Loads (TMDLs).

2016 Integrated List of Waters

2014 Integrated List of Waters

Prior Integrated Lists of Waters

US EPA TMDL Information

MassDEP Publicly-owned Treatment Works Nitrogen Evaluation Study

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