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EPA's Region 6 Office

Serving: Arkansas, Louisiana, New Mexico, Oklahoma, Texas, and 66 Tribal Nations

RCRA Subtitle C (Hazardous Waste) Programs

Hazardous waste is a waste with properties that make it dangerous or potentially harmful to human health or the environment. Hazardous wastes can be liquids, solids, contained gases, or sludges. They can be the by-products of manufacturing processes or simply discarded commercial products, like cleaning fluids or pesticides. In regulatory terms, a RCRA hazardous waste is a waste that appears on one of the four hazardous wastes lists (F-list, K-list, P-list, or U-list), or exhibits at least one of four characteristics-ignitability, corrosivity, reactivity, or toxicity. Hazardous waste is regulated under the Resource Conservation and Recovery Act (RCRA) Subtitle C.


By definition, EPA determined that some specific wastes are hazardous. These wastes are incorporated into lists published by the Agency. These lists are organized into three categories: F-list (non-specific source wastes) found in the regulations at 40 CFR §261.31, K-list (source-specific wastes) found in the regulations at 40 CFR §261.32, and P-list and the U-list (discarded commercial chemical products) found in the regulations at 40 CFR §261.33. See information for Region 6 (links below) or national information (links on the right).

Programs & Resources

  • RCRA Authorization and Codification site provides access to the materials submitted by the States in EPA Region 6 as part of the RCRA Subtitle C authorization process as well as the documents supporting EPA's efforts to codify the authorized State programs....
  • Base Closure/Federal Facilities process to realign and close surplus military property and return the property for local economic development ....
  • Center for Combustion Science and Engineering is a team of professionals who strive to provide quality technical expertise for the operations of combustion units while ensuring local communities protection of human health and the environment.....
  • Cleanup Baseline is part of EPA's RCRA CleanUp Reforms initiative, a Baseline of 1700+ RCRA facilities nationwide published on July 8, 1999....
  • Corrective Action requires investigation and cleanup of releases of hazardous wastes and hazardous constituents that pose an unacceptable risk at RCRA hazardous waste treatment, storage, and disposal facilities....
  • Corrective Action Strategy (CAS) a guideline to accelerate corrective action at RCRA facilities .....
  • Hazardous Waste (RCRA) Enforcement mission is to promote compliance with Federal environmental regulations in partnership with our States and Tribes....
  • Regional Screening Levels (formerly HHMSSL - Human Health Medium-Specific Screening Levels) address common human health exposure pathways.....

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