{"data":{"id":"us/40-cfr-261.24","jurisdiction":"us","citation":"40 CFR 261.24","heading":"Toxicity characteristic.","body":"(a) A solid waste (except manufactured gas plant waste) exhibits the characteristic of toxicity if, using the Toxicity Characteristic Leaching Procedure, test Method 1311 in “Test Methods for Evaluating Solid Waste, Physical/Chemical Methods,” EPA Publication SW-846, as incorporated by reference in § 260.11 of this chapter, the extract from a representative sample of the waste contains any of the contaminants listed in table 1 at the concentration equal to or greater than the respective value given in that table. Where the waste contains less than 0.5 percent filterable solids, the waste itself, after filtering using the methodology outlined in Method 1311, is considered to be the extract for the purpose of this section.\n(b) A solid waste that exhibits the characteristic of toxicity has the EPA Hazardous Waste Number specified in Table 1 which corresponds to the toxic contaminant causing it to be hazardous.\nTable 1 —Maximum Concentration of Contaminants for the Toxicity Characteristic\nEPA HW No. 1 Contaminant CAS No. 2 Regulatory Level (mg/L)\nD004 Arsenic 7440-38-2 5.0\nD005 Barium 7440-39-3 100.0\nD018 Benzene 71-43-2 0.5\nD006 Cadmium 7440-43-9 1.0\nD019 Carbon tetrachloride 56-23-5 0.5\nD020 Chlordane 57-74-9 0.03\nD021 Chlorobenzene 108-90-7 100.0\nD022 Chloroform 67-66-3 6.0\nD007 Chromium 7440-47-3 5.0\nD023 o-Cresol 95-48-7 4 200.0\nD024 m-Cresol 108-39-4 4 200.0\nD025 p-Cresol 106-44-5 4 200.0\nD026 Cresol 4 200.0\nD016 2,4-D 94-75-7 10.0\nD027 1,4-Dichlorobenzene 106-46-7 7.5\nD028 1,2-Dichloroethane 107-06-2 0.5\nD029 1,1-Dichloroethylene 75-35-4 0.7\nD030 2,4-Dinitrotoluene 121-14-2 3 0.13\nD012 Endrin 72-20-8 0.02\nD031 Heptachlor (and its epoxide) 76-44-8 0.008\nD032 Hexachlorobenzene 118-74-1 3 0.13\nD033 Hexachlorobutadiene 87-68-3 0.5\nD034 Hexachloroethane 67-72-1 3.0\nD008 Lead 7439-92-1 5.0\nD013 Lindane 58-89-9 0.4\nD009 Mercury 7439-97-6 0.2\nD014 Methoxychlor 72-43-5 10.0\nD035 Methyl ethyl ketone 78-93-3 200.0\nD036 Nitrobenzene 98-95-3 2.0\nD037 Pentachlorophenol 87-86-5 100.0\nD038 Pyridine 110-86-1 3 5.0\nD010 Selenium 7782-49-2 1.0\nD011 Silver 7440-22-4 5.0\nD039 Tetrachloroethylene 127-18-4 0.7\nD015 Toxaphene 8001-35-2 0.5\nD040 Trichloroethylene 79-01-6 0.5\nD041 2,4,5-Trichlorophenol 95-95-4 400.0\nD042 2,4,6-Trichlorophenol 88-06-2 2.0\nD017 2,4,5-TP (Silvex) 93-72-1 1.0\nD043 Vinyl chloride 75-01-4 0.2\n1 Hazardous waste number.\n2 Chemical abstracts service number.\n3 Quantitation limit is greater than the calculated regulatory level. The quantitation limit therefore becomes the regulatory level.\n4 If o-, m-, and p-Cresol concentrations cannot be differentiated, the total cresol (D026) concentration is used. The regulatory level of total cresol is 200 mg/l.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER I—SOLID WASTES","PART 261—IDENTIFICATION AND LISTING OF HAZARDOUS WASTE","Subpart C—Characteristics of Hazardous Waste"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"23fcbecd301462033ca37c492df8b9350aac458deebfda8ab3a70374d6fe58c8","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-261.23","next":"us/40-cfr-261.30"},"notice":"GroundRules: Original legal text. Not legal advice."}