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Wastewater Treatment Plants

Information and tools for wastewater treatment plant operators

Wastewater treatment plants range from small privately-owned facilities treating sanitary wastewater from a housing development to large regional facilities treating millions of gallons a day of sanitary and industrial wastewater. Plants owned by municipalities are commonly called Publicly-Owned Treatment Plants, or POTWs. In cooperation with local and federal authorities, MassDEP regulates many types of wastewater treatment plants.

Lists of Treatment Plants by town and type

Lists showing the graded facilities in Massachusetts:

Graded Wastewater Treatment Plants by town

Graded Municipal Wastewater Treatment Plants

Graded Industrial Wastewater Treatment  Plants

A list of treatment plants with permits to discharge wastewater to groundwater:

Wastewater treatment plants discharging to groundwater

Regulations for Wastewater Treatment Plants and Operators


Additional Resources

Tools & Resources for Treatment Plant Owners and Operators

Additional Resources


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