Massachusetts Neutralization of Wastes: What you need to know

Governing Law and Regulations

Neutralization of wastes: 310 Code of Massachusetts Regulations (CMR) 30.010

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Elementary neutralization unit (ENU): 310 CMR 30.1103

Regulatory Agency

Massachusetts Department of Environmental Protection (DEP) Bureau of Waste Prevention Business Compliance Division

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Both Massachusetts and the U.S. Environmental Protection Agency (EPA) define hazardous waste treatment to include neutralization of wastes. However, unlike the federal definition, the state's definition of treatment of hazardous waste includes the permit exemption for hazardous waste neutralization units. Note that Massachusetts's permit exemption for neutralization units is more restrictive than the federal exemption. In order to qualify for the permit exemption in Massachusetts, neutralization units must meet stringent construction standards. In addition, Massachusetts has additional licensing exception requirements for the treatment of corrosive hazardous waste in an ENU.

Administration and enforcement. DEP's Business Compliance Division administers and enforces the hazardous waste neutralization rules in Massachusetts.

State Requirements



310 CMR 30.010

For neutralization units to be exempt from the state's hazardous waste permit requirements, the unit must be included as an integral part of the manufacturing process at the point of generation, must be not primarily for the purpose of recycling, and must be:

  • Directly connected by pipes or the equivalent from an industrial production process or produces a material ...

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State Requirements

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Massachusetts Neutralization of Wastes Resources

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