California Code of Regulations › Title 17 - Public Health › Division 3 - Air Resources › Chapter 1 - Air Resources Board › Subchapter 7 - Toxic Air Contaminants › Section 93001 - Hazardous Air Pollutants Identified as Toxic Air Contaminants

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Each substance listed in this section has been identified
					 as a hazardous air pollutant pursuant to subsection (b) of Section
					 112 of the federal Clean Air Act
					 (42 U.S.C. Section
					 7412(b)) and has been
					 designated by the State Board to be a toxic air contaminant pursuant to Health
					 and Safety Code Section
					 39657.
Substance
Acetaldehyde
Acetamide
Acetonitrile
Acetophenone
2-Acetylaminofluorene
Acrolein
Acrylamide
Acrylic acid
Acrylonitrile
Allyl chloride
4-Aminobiphenyl
Aniline
o-Anisidine
Asbestos
Benzene (including benzene from
							 gasoline)
Benzidine
Benzotrichloride
Benzyl chloride
Biphenyl
Bis (2-ethylhexyl) phthalate (DEHP)
Bis (chloromethyl) ether
Bromoform
1,3-Butadiene
Calcium cyanamide
Caprolactam
Captan
Carbaryl
Carbon disulfide
Carbon tetrachloride
Carbonyl sulfide
Catechol
Chloramben
Chlordane
Chlorine
Chloroacetic acid
2-Chloroacetophenone
Chlorobenzene
Chlorobenzilate
Chloroform
Chloromethyl methyl ether
Chloroprene
Cresols/Cresylic acid (isomers and
							 mixture)
o-Cresol
m-Cresol
p-Cresol
Cumene
2,4-D, salts and esters
DDE
Diazomethane
Dibenzofurans
1,2-Dibromo-3-chloropropane
Dibutylphthalate
1,4-Dichlorobenzene (p)
3,3-Dichlorobenzidene
Dichloroethyl ether (Bis (2-chloroethyl)
							 ether)
1,3-Dichloropropene
Dichlorvos
Diethanolamine
N.N-Diethyl aniline
							 (N.N-Dimethylaniline)
Diethyl sulfate
3,3-Dimethoxybenzidine
Dimethyl aminoazobenzene
3,3-Dimethyl benzidine
Dimethyl carbamoyl chloride
Dimethyl formamide
1,1-Dimethyl hydrazine
Dimethyl phthalate
Dimethyl sulfate
4,6-Dinitro-o-cresol, and salts
2,4-Dinitrophenol
2,4-Dinitrotoluene
1,4-Dioxane (1,4-Diethyleneoxide)
1,2-Diphenylhydrazine
Epichlorohydrin
							 (1-Chloro-2,3-epoxypropane)
1,2-Epoxybutane
Ethyl acrylate
Ethyl benzene
Ethyl carbamate (Urethane)
Ethyl chloride (Chloroethane)
Ethylene dibromide (Dibromoethane)
Ethylene dichloride
							 (1,2-Dichloroethane)
Ethylene glycol
Ethylene imine (Aziridine)
Ethylene oxide
Ethylene thiourea
Ethylidene dichloride
							 (1,1-Dichloroethane)
Formaldehyde
Heptachlor
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclopentadiene
Hexachloroethane
Hexamethylene-1,6-diisocyanate
Hexamethylphosphoramide
Hexane
Hydrazine
Hydrochloric acid
Hydrogen fluoride (Hydrofluoric acid)
Hydroquinone
Isophorone
Lindane (all isomers)
Maleic anhydride
Methanol
Methoxychlor
Methyl bromide (Bromomethane)
Methyl chloride (Chloromethane)
Methyl chloroform
							 (1,1,1-Trichloroethane)
Methyl ethyl ketone (2-Butanone)
Methyl hydrazine
Methyl iodide (Iodomethane)
Methyl isobutyl ketone (Hexone)
Methyl isocyanate
Methyl methacrylate
Methyl tert butyl ether
4,4-Methylene bis(2-chloroaniline)
Methylene chloride (Dichloromethane)
Methylene diphenyl diisocyanate (MDI)
4,4-Methylenedianiline
Naphthalene
Nitrobenzene
4-Nitrobiphenyl
4-Nitrophenol
2-Nitropropane
N-Nitroso-N-methylurea
N-Nitrosodimethylamine
N-Nitrosomorpholine
Parathion
Pentachloronitrobenzene
							 (Quintobenzene)
Pentachlorophenol
Phenol
p-Phenylenediamine
Phosgene
Phosphine
Phosphorus
Phthalic anhydride
Polychlorinated biphenyls (Aroclors)
1,3-Propane sultone
beta-Propiolactone
Propionaldehyde
Propoxur (Baygon)
Prophylene dichloride
							 (1,2-Dichloropropane)
Propylene oxide
1,2-Propylenimine (2-Methylaziridine)
Quinoline
Quinone
Styrene
Styrene oxide
2,3,7,8-Tetrachlorodibenzo-p-dioxin
1,1,2,2-Tetrachloroethane
Tetrachloroethylene
							 (Perchloroethylene)
Titanium tetrachloride
Toluene
2,4-Toluene diamine
2,4-Toluene diisocyanate
o-Toluidine
Toxaphene (chlorinated camphene)
1,2,4-Trichlorobenzene
1,1,2-Trichloroethane
Trichloroethylene
2,4,5-Trichlorophenol
2,4,6-Trichlorophenol
Triethylamine
Trifluralin
2,2,4-Trimethylpentane
Vinyl acetate
Vinyl bromide
Vinyl chloride
Vinylidene chloride
							 (1,1-Dichloroethylene)
Xylenes (isomers and mixture)
o-Xylenes
m-Xylenes
p-Xylenes
Antimony Compounds
Arsenic Compounds (inorganic including
							 arsine)
Beryllium Compounds
Cadmium Compounds
Chromium Compounds
Cobalt Compounds
Coke Oven Emissions
Cyanide
							 Compounds1
Glycol
							 ethers2
Lead Compounds
Manganese Compounds
Mercury Compounds
Fine mineral
							 fibers3
Nickel Compounds
Polycyclic Organic
							 Matter4
Radionuclides (including
							 radon)5
Selenium Compounds
NOTE: For all listing above which contain
							 the word "compounds" and for glycol ethers, the following applies: Unless
							 otherwise specified, these listings are defined as including any unique
							 chemical substance that contains the named chemical (i.e., antimony, arsenic,
							 etc) as part of that chemical's infrastructure.
1
							 X1CN where X=HN1 or any
							 other group where a formal dissociation may occur. For example KCN or
							 Ca(CN)2
2 includes
							 mono- and di-ethers of ethylene glycol, diethylene glycol, and triethylene
							 glycol
							 (R(OCH2CH2)n-OR1
							 where
n = 1,2 or 3
R = alkyl or aryl groups
R1 = R, H, or
							 groups which, when removed, yield glycol ethers with the structure;
R(OCH2CH)n-OH.
							 Polymers are excluded from the glycol category.
3 includes
							 mineral fiber emissions from facilities manufacturing or processing glass,
							 rock, or slag fibers (or other mineral derived fibers) of average diameter 1
							 micrometer or less.
4 includes
							 organic compounds with more than one benzene ring, and which have a boiling
							 point greater than or equal to 100°C.
5 a type of
							 atom which spontaneously undergoes radioactive decay.
1. New
					 section filed 3-9-94; operative 4-8-94. Submitted to OAL for printing only
					 (Register 94, No. 10).
Note: Authority cited: Sections
						39657,
						39600,
						39601
						and
						39662,
						Health and Safety Code. Reference: Sections
						39650,
						39655,
						39656,
						39657,
						39658,
						39659,
						39660,
						39661
						and
						39662,
						Health and Safety Code.