RCRA Hazardous Waste Code Lookup
Search all EPA hazardous waste codes: F-list (non-specific source), K-list (specific source), P-list (acutely hazardous), U-list (toxic chemicals), and D-codes (characteristics). Enter a chemical name, CAS number, or waste code.
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Understanding RCRA Waste Codes
F-codes (F001-F039) are non-specific source wastes. They come from common industrial processes regardless of the industry. Examples include spent halogenated solvents (F001) and wastewater treatment sludges from electroplating (F006).
K-codes (K001-K178) are specific source wastes generated by particular industries. For example, K001 is bottom sediment sludge from the wood preserving industry.
P-codes (P001-P205) are acutely hazardous commercial chemical products. These have the lowest RQs (typically 1 pound) and trigger more stringent generator requirements. A facility generating more than 1 kg of P-listed waste per month is a Large Quantity Generator.
U-codes (U001-U411) are toxic commercial chemical products. They apply when the chemical is discarded as a commercial product (unused or off-spec), not when it appears as a component in a process waste.
D-codes (D001-D043) are characteristic wastes identified by testing: ignitability (D001), corrosivity (D002), reactivity (D003), or toxicity (D004-D043 via TCLP testing).
PCBs and TSCA waste: Polychlorinated biphenyls (PCBs) are regulated under the Toxic Substances Control Act (TSCA), not RCRA. PCB waste does not have a specific RCRA waste code. However, PCB-contaminated waste may also carry RCRA characteristic codes (D-codes) if it fails TCLP for metals or other contaminants. PCB disposal is governed by 40 CFR Part 761, not 40 CFR Part 261. See our UN Lookup tool for PCB emergency response information.