Missouri Accumulation Time regulations & environmental compliance analysis

Missouri Accumulation Time: What you need to know

Governing Law and Regulations

Accumulation time requirements: 10 Missouri Code of State Regulations (CSR) 25-5.262(1)

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Accumulation quantity limitations for conditionally exempt small quantity generators: 10 CSR 25-3.260(1)(A)24

Regulatory Agency

Missouri Department of Natural Resources (DNR) Division of Environmental Quality (DEQ) Hazardous Waste Program

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Missouri adopts by reference the federal accumulation time rules that allow generators to accumulate hazardous waste on-site without a permit for specific periods of time. See the national section ACCUMULATION TIME to review the specific time periods applicable to each type of generator. In addition to following the federal rules, Missouri has added a quantity limitation for conditionally exempt small quantity generators (CESQGs).

Generators should note that Missouri requires generators to comply with on-site storage standards that are in addition to those required under federal law. See the state section HAZARDOUS WASTE STORAGE for guidance on how to store hazardous waste on-site without a permit in compliance with the state's more stringent requirements.

Administration and enforcement. The Missouri Department of Natural Resources' Division of Environmental Quality administers and enforces the generator accumulation time requirements in Missouri.

State Requirements


10 CSR 25-3.260(1)(A)24

Missouri specifies that any person who accumulates, at any time, 100 kg of hazardous waste is subject to the state's hazardous waste generator regulations. This is in contrast to the federal rules, which allow ...

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