Massachusetts Effluent Limitations: What you need to know

Governing Law and Regulations

Surface water classes: 314 Code of Massachusetts Regulations (CMR) 4.05

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Inland waters: 314 CMR 4.05(3)

Coastal and marine waters: 314 CMR 4.05(4)

Additional criteria: 314 CMR 4.05(5)

Surface water permit program: 314 CMR 3.01 to 3.19

Calculating effluent limits: 314 CMR 3.11(7)

Toxic pollutants: 314 CMR 3.17 and 314 CMR 4.02

Groundwater discharges: 314 CMR 5.10 and 314 CMR 5.16

Permit conditions: 314 CMR 5.10

Regulatory Agencies

Massachusetts Department of Environmental Protection (DEP) Bureau of Resource Protection

U.S. Environmental Protection Agency (EPA) Region 1

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Massachusetts controls water pollution under state water quality and minimum effluent treatment standards. Massachusetts generally follows the federal rules for establishing effluent limitations and, in some cases, exceeds the federal standards for specific compounds. A facilities discharge permit typically outlines site-specific effluent standards.

Administration and enforcement. DEP's Bureau of Resource Protection administers and enforces the state's effluent limitation regulations.

State Requirements


Effluent limitations are based on the water quality of the surface or groundwater where the discharge will occur. The specific water quality standards for the receiving water body should be determined before a discharge permit is proposed. For more information on groundwater discharge regulation, see the state section GROUNDWATER.

All of the water classifications include provisions for temperature. For details on temperature ...

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State Requirements

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Massachusetts Effluent Limitations Resources

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