Hazardous Air Pollutants (Clean Air Act)

REGULATIONS|Federal Regulatory Program Lists

List:

Description
The U.S. Congress amended the federal Clean Air Act in 1990 to address a large number of air pollutants that are known to cause or may reasonably be anticipated to cause adverse effects to human health or adverse environmental effects. 188 specific pollutants and chemical groups were initially identified as hazardous air pollutants (HAPs), and the list has been modified over time.

Section 112 of the Clean Air Act governs the federal control program for hazardous air pollutants. "National emissions standards for hazardous air pollutants" (NESHAPs) are issued to limit the release of specified HAPs from specific industrial sectors. These standards are "technology-based," meaning that they represent the best available control technology an industrial sector could afford. The level of emissions controls required by NESHAPs are not based on health risk considerations: allowable releases and resulting concentrations have not been determined to be safe for the general public. The Clean Air Act does not establish air quality standards for HAPs that define legally acceptable concentrations of these pollutants in ambient air.

Reference
EPA, Office of Air Quality, Planning & Standards. Section 112 Hazardous Air Pollutants List.
http://www.epa.gov/ttn/atw/188polls.html

EPA, Office of Air Quality, Planning & Standards. Modifications to the 112(b)1 Hazardous Air Pollutants.
http://www.epa.gov/ttn/atw/atwsmod.html

List of Chemicals
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Chemical Name CAS Registry Number (or EDF Substance ID)

ACETALDEHYDE 75-07-0

ACETAMIDE 60-35-5

ACETONITRILE 75-05-8

ACETOPHENONE 98-86-2

2-ACETYLAMINOFLUORENE 53-96-3

ACROLEIN 107-02-8

ACRYLAMIDE 79-06-1

ACRYLIC ACID 79-10-7

ACRYLONITRILE 107-13-1

ALLYL CHLORIDE 107-05-1

4-AMINOBIPHENYL 92-67-1

ANILINE 62-53-3

ANTIMONY 7440-36-0

ANTIMONY COMPOUNDS ADQ500

ARSENIC 7440-38-2

ASBESTOS (FRIABLE) 1332-21-4

BENZENE 71-43-2

BENZIDINE 92-87-5

BENZOIC TRICHLORIDE 98-07-7

BENZYL CHLORIDE 100-44-7

BERYLLIUM 7440-41-7

BERYLLIUM COMPOUNDS BFQ500

BETA-PROPIOLACTONE 57-57-8

BIPHENYL 92-52-4

(1,1'-BIPHENYL)-4,4'-DIAMINE, 3,3'-DIMETHYL- 119-93-7

BIS(2-CHLOROETHYL) ETHER 111-44-4

BIS(2-ETHYLHEXYL)PHTHALATE 117-81-7

BIS(CHLOROMETHYL) ETHER 542-88-1

1,3-BUTADIENE 106-99-0

1,2-BUTYLENE OXIDE 106-88-7

CADMIUM 7440-43-9

CADMIUM COMPOUNDS CAE750

CALCIUM CYANAMIDE 156-62-7

CAMPHECHLOR 8001-35-2

CAPTAN 133-06-2

CARBARYL 63-25-2

CARBON DISULFIDE 75-15-0

CARBON TETRACHLORIDE 56-23-5

CARBONYL SULFIDE 463-58-1

CATECHOL 120-80-9

2-CHLOR-1,3-BUTADIENE 126-99-8

CHLORAMBEN 133-90-4

CHLORDANE 57-74-9

CHLORINE 7782-50-5

CHLOROACETIC ACID 79-11-8

2-CHLOROACETOPHENONE 532-27-4

CHLOROBENZENE 108-90-7

CHLOROBENZILATE 510-15-6

CHLOROETHANE 75-00-3

CHLOROFORM 67-66-3

CHLOROMETHANE 74-87-3

CHLOROMETHYL METHYL ETHER 107-30-2

CHROMIUM 7440-47-3

CHROMIUM COMPOUNDS CMJ500

COBALT 7440-48-4

COBALT COMPOUNDS CNB850

COKE OVEN EMISSIONS 1066

CRESOL (MIXED ISOMERS) 1319-77-3

CUMENE 98-82-8

CYANIDE COMPOUNDS 1073

2,4-D 94-75-7

DDE 72-55-9

2,4-DIAMINOTOLUENE 95-80-7

DIAZOMETHANE 334-88-3

DIBENZOFURAN 132-64-9

1,2-DIBROMO-3-CHLOROPROPANE (DBCP) 96-12-8

1,2-DIBROMOETHANE 106-93-4

DIBUTYL PHTHALATE 84-74-2

1,4-DICHLOROBENZENE 106-46-7

3,3'-DICHLOROBENZIDINE 91-94-1

1,1-DICHLOROETHANE 75-34-3

1,2-DICHLOROETHANE 107-06-2

1,1-DICHLOROETHYLENE 75-35-4

DICHLOROMETHANE 75-09-2

1,2-DICHLOROPROPANE 78-87-5

1,3-DICHLOROPROPENE (MIXED ISOMERS) 542-75-6

DICHLORVOS 62-73-7

DIETHANOLAMINE 111-42-2

DIETHYL SULFATE 64-67-5

3,3'-DIMETHOXYBENZIDINE 119-90-4

1,1-DIMETHYL HYDRAZINE 57-14-7

DIMETHYL PHTHALATE 131-11-3

DIMETHYL SULFATE 77-78-1

4-DIMETHYLAMINOAZOBENZENE 60-11-7

DIMETHYLCARBAMOYL CHLORIDE 79-44-7

4,6-DINITRO-O-CRESOL 534-52-1

2,4-DINITROPHENOL 51-28-5

2,4-DINITROTOLUENE 121-14-2

1,4-DIOXANE 123-91-1

1,2-DIPHENYLHYDRAZINE 122-66-7

EPICHLOROHYDRIN 106-89-8

ETHYL ACRYLATE 140-88-5

ETHYLBENZENE 100-41-4

ETHYLENE GLYCOL 107-21-1

ETHYLENE GLYCOL MONOETHYL ETHER 110-80-5

ETHYLENE GLYCOL MONOMETHYL ETHER 109-86-4

ETHYLENE OXIDE 75-21-8

ETHYLENE THIOUREA 96-45-7

ETHYLENEIMINE 151-56-4

FORMALDEHYDE 50-00-0

GAMMA-LINDANE 58-89-9

GLYCOL ETHERS EDF-109

HEPTACHLOR 76-44-8

HEXACHLORO-1,3-BUTADIENE 87-68-3

HEXACHLOROBENZENE 118-74-1

HEXACHLOROCYCLOPENTADIENE 77-47-4

HEXACHLOROETHANE 67-72-1

HEXAMETHYLENE-1,6-DIISOCYANATE 822-06-0

HEXAMETHYLPHOSPHORAMIDE 680-31-9

HYDRAZINE 302-01-2

HYDROCHLORIC ACID 7647-01-0

HYDROFLUORIC ACID 7664-39-3

HYDROGEN CYANIDE 74-90-8

HYDROQUINONE 123-31-9

INORGANIC ARSENIC COMPOUNDS EDF-222

ISOPHORONE 78-59-1

LEAD 7439-92-1

LEAD COMPOUNDS LCT000

M-CRESOL 108-39-4

M-XYLENE 108-38-3

MALEIC ANHYDRIDE 108-31-6

MANGANESE 7439-96-5

MANGANESE COMPOUNDS MAR500

MERCURY 7439-97-6

MERCURY COMPOUNDS EDF-033

METHANAMINE, N-METHYL-N-NITROSO 62-75-9

METHANOL 67-56-1

METHOXYCHLOR 72-43-5

METHYL BROMIDE 74-83-9

METHYL ETHYL KETONE 78-93-3

METHYL HYDRAZINE 60-34-4

METHYL IODIDE 74-88-4

METHYL ISOBUTYL KETONE 108-10-1

METHYL ISOCYANATE 624-83-9

METHYL METHACRYLATE 80-62-6

METHYL TERT-BUTYL ETHER 1634-04-4

4,4'-METHYLENEBIS(2-CHLOROANILINE) 101-14-4

1,1'-METHYLENEBIS(4-ISOCYANATOBENZENE) 101-68-8

4,4'-METHYLENEDIANILINE 101-77-9

MINERAL FIBERS 1136

N,N-DIMETHYLANILINE 121-69-7

N,N-DIMETHYLFORMAMIDE 68-12-2

N-HEXANE 110-54-3

N-NITROSO-N-METHYLUREA 684-93-5

N-NITROSOMORPHOLINE 59-89-2

NAPHTHALENE 91-20-3

NICKEL 7440-02-0

NICKEL COMPOUNDS NDB000

NITROBENZENE 98-95-3

4-NITROBIPHENYL 92-93-3

4-NITROPHENOL 100-02-7

2-NITROPROPANE 79-46-9

O-ANISIDINE 90-04-0

O-CRESOL 95-48-7

O-TOLUIDINE 95-53-4

O-XYLENE 95-47-6

P-CRESOL 106-44-5

P-PHENYLENEDIAMINE 106-50-3

P-XYLENE 106-42-3

PARATHION 56-38-2

PENTACHLOROPHENOL 87-86-5

PHENOL 108-95-2

PHOSGENE 75-44-5

PHOSPHINE 7803-51-2

PHOSPHORUS COMPOUNDS PHQ000

PHTHALIC ANHYDRIDE 85-44-9

POLYCHLORINATED BIPHENYLS 1336-36-3

POLYCYCLIC ORGANIC MATTER (POM) EDF-047

PROPANE SULTONE 1120-71-4

PROPIONALDEHYDE 123-38-6

PROPOXUR 114-26-1

PROPYLENE OXIDE 75-56-9

PROPYLENEIMINE 75-55-8

QUINOLINE 91-22-5

QUINONE 106-51-4

QUINTOZENE 82-68-8

RADIONUCLIDES 1165

SELENIUM 7782-49-2

SELENIUM COMPOUNDS SBP500

STYRENE 100-42-5

STYRENE OXIDE 96-09-3

2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN (TCDD) 1746-01-6

1,1,2,2-TETRACHLOROETHANE 79-34-5

TETRACHLOROETHYLENE 127-18-4

TITANIUM TETRACHLORIDE 7550-45-0

TOLUENE 108-88-3

TOLUENE-2,4-DIISOCYANATE 584-84-9

TRANS-1,3-DICHLOROPROPENE 10061-02-6

TRIBROMOMETHANE 75-25-2

1,2,4-TRICHLOROBENZENE 120-82-1

1,1,1-TRICHLOROETHANE 71-55-6

1,1,2-TRICHLOROETHANE 79-00-5

TRICHLOROETHYLENE 79-01-6

2,4,6-TRICHLOROPHENOL 88-06-2

2,4,5-TRICHLOROPHENOL 95-95-4

TRIETHYLAMINE 121-44-8

TRIFLURALIN 1582-09-8

2,2,4-TRIMETHYLPENTANE 540-84-1

URETHANE 51-79-6

VINYL ACETATE 108-05-4

VINYL BROMIDE 593-60-2

VINYL CHLORIDE 75-01-4

XYLENE (MIXED ISOMERS) 1330-20-7

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