Listed Wastes: What you need to know

Governing Law and Regulations

Hazardous waste determination: 40 CFR 261.1 to 261.38

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Listing criteria: 40 CFR 261.11

Hazardous waste identification rule (HWIR): 40 CFR 261.3(g)

Waste codes: 40 CFR 261.31 to 261.33

Hazard codes: 40 CFR 261.30

The F list—wastes from nonspecific sources: 40 CFR 261.31

The K list—wastes from specific sources: 40 CFR 261.32

P and U wastes—discarded commercial chemicals: 40 CFR 261.33

Hazardous constituents and chemical abstract (CAS) numbers: 40 CFR 261, Appendices VII to IX

Delisting petitions: 40 CFR 260.22

Regulatory Agency

U.S. Environmental Protection Agency (EPA) Office of Solid Waste and Emergency Response Office of Resource Conservation and Recovery (ORCR)

See ADDRESSES & CONTACTS for addresses and telephone numbers.



40 CFR 261.1 to 261.38

After a facility determines that its waste is a solid waste and is not either excluded from the definitions of solid or hazardous waste or exempt from RCRA Subtitle C hazardous waste regulation, it is a generator's responsibility to determine if a waste is hazardous. Generators must check all hazardous waste lists (as periodically amended by EPA in the Federal Register), apply their knowledge of materials and processes used to produce the waste, and use any available standardized method of testing that is reasonably within their capability or private sector laboratories that are available.

Wastes are hazardous if they:

  • Are listed under 40 CFR 261;
  • Are known to the generator to be hazardous on the basis of the knowledge of the processes or materials used to generate the waste; or
  • Exhibit any one of the four hazardous "characteristics": —Ignitability —Corrosivity —Reactivity ...

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State Requirements

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Listed Wastes Resources

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