Substance list by threshold

The National Pollutant Release Inventory (NPRI) tracks the release of substances to the environment, including their disposal or their transfer for recycling.  This information is collected and published because they may pose a risk to the environment or to health.

The substances listed on the NPRI are organized into five parts, each having different reporting requirements.  Detailed explanations can be found in the Guide for reporting to the NPRI.  

Part  1A     
Commonly referred to as “core substances”, this group makes up the majority of substances on the NPRI list and most have been on it since the start of the NPRI.  
Part  1B These substances are referred to as “alternate threshold substances” and have a lower reporting threshold than Part 1A substances.  They may have significant environmental or human health impacts in small amounts.
Part  2 These substances are polycyclic aromatic hydrocarbons (PAHs) that may be used as commercial chemicals, incidentally manufactured in certain industrial processes, or contained in tailings.
Part  3 These substances are polychlorinated dibenzo-p-dioxins (dioxins), polychlorinated dibenzofurans (furans) and hexachlorobenzene that are released as by-products of industrial and combustion processes. 
They can be found as contaminants in pesticides, solvents or wood preservatives.
Part  4 These substances are known as criteria air contaminants (CACs), commonly released from combustion sources that can cause or contribute to air issues such as smog and acid rain.
Part  5

These substances are volatile organic compounds (VOCs) also known as “speciated VOCs” which are subject to additional reporting requirements.  They are listed on the NPRI in three groups:

  • individual substances
  • isomer groups
  • other groups and mixtures

Before using the NPRI substance list

MPO    "Manufactured, processed or otherwise used" refers to the amount of the substance produced, prepared or used in any other way at a facility.
PAH Polycyclic aromatic hydrocarbons may be used as commercial chemicals, incidentally manufactured in certain industrial processes, or contained in tailings.
VOC Volatile organic compounds are substances that contribute to air pollution.  They appear in each part of the NPRI substance list and have varying reporting requirements.
CAS RN    Chemical abstract service registry number is the property of the American Chemical Society.  Note:  Any use or redistribution is not permitted without the prior, written permission of the American Chemical Society except as required in supporting regulatory requirements and/or for reports to the government when the information and the reports are required by law or administrative policy.
NA - ## Other substance identifiers used where no single CAS RN applies to a substance.


Further information and definitions are available in our Glossary of terms.

Visit the History of reporting requirements page for more information on how the NPRI substance list has changed since the start of the program.

Other formats

You can download the NPRI substance list in Excel format.

Contact the NPRI for substance lists from past years.

 2020 to 2021 NPRI substance list

The "Filter items" field can be used to filter by substance name, CAS RN, part #, reporting threshold, or substance category. To filter by part, type "Part #" where # is the part you wish to view (e.g. Part 1A or Part 5, etc.) including the quotation marks to ensure an exact match.

2020-2021 NPRI substance list
Substance name CAS RN or other substance identifier Part # (threshold category) Reporting threshold Substance category
Acetaldehyde 75-07-0 Part 1A 10 tonnes MPO
VOC
Acetonitrile 75-05-8 Part 1A 10 tonnes MPO VOC
Acetophenone 98-86-2 Part 1A 10 tonnes MPO VOC
Acrolein 107-02-8 Part 1A 10 tonnes MPO VOC
Acrylamide 79-06-1 Part 1A 10 tonnes MPO VOC
Acrylic acid (and its salts)Footnote 1 79-10-7 Part 1A 10 tonnes MPO VOC
Allyl alcohol 107-18-6 Part 1A 10 tonnes MPO N/A
Aluminum (fume or dust only) 7429-90-5 Part 1A 10 tonnes MPO N/A
Aluminum oxide (fibrous forms only) 1344-28-1 Part 1A 10 tonnes MPO N/A
Ammonia (total)Footnote 2 NA - 16 Part 1A 10 tonnes MPO N/A
Aniline (and its salts)Footnote 1 62-53-3 Part 1A 10 tonnes MPO N/A
Antimony (and its compounds)Footnote 3 NA - 01 Part 1A 10 tonnes MPO N/A
Asbestos (friable form only) 1332-21-4 Part 1A 10 tonnes MPO N/A
Benzene 71-43-2 Part 1A 10 tonnes MPO VOC
Benzoyl chloride 98-88-4 Part 1A 10 tonnes MPO N/A
Benzoyl peroxide 94-36-0 Part 1A 10 tonnes MPO N/A
Benzyl chloride 100-44-7 Part 1A 10 tonnes MPO VOC
Biphenyl 92-52-4 Part 1A 10 tonnes MPO VOC
Bis (2-ethylhexyl) adipate 103-23-1 Part 1A 10 tonnes MPO N/A
Bis (2-ethylhexyl) phthalate 117-81-7 Part 1A 10 tonnes MPO N/A
Boron trifluoride 7637-07-2 Part 1A 10 tonnes MPO N/A
Bromine 7726-95-6 Part 1A 10 tonnes MPO N/A
Bromomethane 74-83-9 Part 1A 10 tonnes MPO VOC
1,3-Butadiene 106-99-0 Part 1A 10 tonnes MPO VOC
2-Butoxyethanol 111-76-2 Part 1A 10 tonnes MPO VOC
Butyl acrylate 141-32-2 Part 1A 10 tonnes MPO VOC
i-Butyl alcohol 78-83-1 Part 1A 10 tonnes MPO VOC
n-Butyl alcohol 71-36-3 Part 1A 10 tonnes MPO VOC
sec-Butyl alcohol 78-92-2 Part 1A 10 tonnes MPO VOC
tert-Butyl alcohol 75-65-0 Part 1A 10 tonnes MPO VOC
Butyl benzyl phthalate 85-68-7 Part 1A 10 tonnes MPO VOC
1,2-Butylene oxide 106-88-7 Part 1A 10 tonnes MPO VOC
Butyraldehyde 123-72-8 Part 1A 10 tonnes MPO VOC
C.I. Basic Green 4 569-64-2 Part 1A 10 tonnes MPO N/A
Calcium fluoride 7789-75-5 Part 1A 10 tonnes MPO N/A
Carbon disulphide 75-15-0 Part 1A 10 tonnes MPO VOC
Carbon tetrachloride 56-23-5 Part 1A 10 tonnes MPO VOC
Carbonyl sulphide 463-58-1 Part 1A 10 tonnes MPO VOC
Catechol 120-80-9 Part 1A 10 tonnes MPO N/A
CFC-11 75-69-4 Part 1A 10 tonnes MPO N/A
CFC-12 75-71-8 Part 1A 10 tonnes MPO N/A
CFC-13 75-72-9 Part 1A 10 tonnes MPO VOC
CFC-114 76-14-2 Part 1A 10 tonnes MPO N/A
CFC-115 76-15-3 Part 1A 10 tonnes MPO N/A
Chlorine 7782-50-5 Part 1A 10 tonnes MPO N/A
Chlorine dioxide 10049-04-4 Part 1A 10 tonnes MPO N/A
Chloroacetic acid (and its salts)Footnote 1 79-11-8 Part 1A 10 tonnes MPO N/A
Chlorobenzene 108-90-7 Part 1A 10 tonnes MPO VOC
Chloroethane 75-00-3 Part 1A 10 tonnes MPO VOC
Chloroform 67-66-3 Part 1A 10 tonnes MPO VOC
Chloromethane 74-87-3 Part 1A 10 tonnes MPO VOC
Chromium (and its compounds)Footnote 4 NA - 04 Part 1A 10 tonnes MPO N/A
Copper (and its compounds)Footnote 3 NA - 06 Part 1A 10 tonnes MPO N/A
Cresol (all isomers, and their salts)Footnote 1Footnote 5 1319-77-3 Part 1A 10 tonnes MPO VOC
Cumene 98-82-8 Part 1A 10 tonnes MPO VOC
Cumene hydroperoxide 80-15-9 Part 1A 10 tonnes MPO N/A
Cyanides (ionic) NA - 07 Part 1A 10 tonnes MPO N/A
Cyclohexane 110-82-7 Part 1A 10 tonnes MPO VOC
Cyclohexanol 108-93-0 Part 1A 10 tonnes MPO VOC
2,6-Di- t-butyl-4-methylphenol 128-37-0 Part 1A 10 tonnes MPO N/A
Dibutyl phthalate 84-74-2 Part 1A 10 tonnes MPO VOC
o-Dichlorobenzene 95-50-1 Part 1A 10 tonnes MPO VOC
p-Dichlorobenzene 106-46-7 Part 1A 10 tonnes MPO VOC
3,3'-Dichlorobenzidine dihydrochloride 612-83-9 Part 1A 10 tonnes MPO N/A
1,2-Dichloroethane 107-06-2 Part 1A 10 tonnes MPO VOC
Dichloromethane 75-09-2 Part 1A 10 tonnes MPO N/A
2,4-Dichlorophenol (and its salts)Footnote 1 120-83-2 Part 1A 10 tonnes MPO N/A
1,2-Dichloropropane 78-87-5 Part 1A 10 tonnes MPO VOC
Dicyclopentadiene 77-73-6 Part 1A 10 tonnes MPO VOC
Diethanolamine (and its salts)Footnote 1 111-42-2 Part 1A 10 tonnes MPO N/A
Diethyl phthalate 84-66-2 Part 1A 10 tonnes MPO N/A
Diethyl sulphate 64-67-5 Part 1A 10 tonnes MPO N/A
Dimethylamine 124-40-3 Part 1A 10 tonnes MPO VOC
N,N-Dimethylaniline (and its salts)Footnote 1 121-69-7 Part 1A 10 tonnes MPO N/A
N,N-Dimethylformamide 68-12-2 Part 1A 10 tonnes MPO VOC
Dimethyl phthalate
131-11-3 Part 1A 10 tonnes MPO
N/A
Dimethyl sulphate 77-78-1 Part 1A 10 tonnes MPO N/A
4,6-Dinitro- o -cresol (and its salts)Footnote 1 534-52-1 Part 1A 10 tonnes MPO N/A
2,4-Dinitrotoluene 121-14-2 Part 1A 10 tonnes MPO N/A
Di- n -octyl phthalate 117-84-0 Part 1A 10 tonnes MPO N/A
1,4-Dioxane 123-91-1 Part 1A 10 tonnes MPO VOC
Diphenylamine 122-39-4 Part 1A 10 tonnes MPO VOC
Epichlorohydrin 106-89-8 Part 1A 10 tonnes MPO VOC
2-Ethoxyethanol 110-80-5 Part 1A 10 tonnes MPO VOC
2-Ethoxyethyl acetate 111-15-9 Part 1A 10 tonnes MPO VOC
Ethyl acrylate 140-88-5 Part 1A 10 tonnes MPO VOC
Ethylbenzene 100-41-4 Part 1A 10 tonnes MPO VOC
Ethylene 74-85-1 Part 1A 10 tonnes MPO VOC
Ethylene glycol 107-21-1 Part 1A 10 tonnes MPO VOC
Ethylene oxide 75-21-8 Part 1A 10 tonnes MPO VOC
Ethylene thiourea 96-45-7 Part 1A 10 tonnes MPO N/A
Fluorine 7782-41-4 Part 1A 10 tonnes MPO N/A
Formaldehyde 50-00-0 Part 1A 10 tonnes MPO VOC
Formic acid 64-18-6 Part 1A 10 tonnes MPO VOC
Halon 1211 353-59-3 Part 1A 10 tonnes MPO N/A
Halon 1301 75-63-8 Part 1A 10 tonnes MPO N/A
HCFC-22 75-45-6 Part 1A 10 tonnes MPO N/A
HCFC-122 (all isomers)Footnote 6 41834-16-6 Part 1A 10 tonnes MPO N/A
HCFC-123 (all isomers)Footnote 7 34077-87-7 Part 1A 10 tonnes MPO N/A
HCFC-124 (all isomers)Footnote 8 63938-10-3 Part 1A 10 tonnes MPO N/A
HCFC-141b 1717-00-6 Part 1A 10 tonnes MPO N/A
HCFC-142b 75-68-3 Part 1A 10 tonnes MPO N/A
Hexachlorocyclopentadiene 77-47-4 Part 1A 10 tonnes MPO N/A
Hexachlorophene 70-30-4 Part 1A 10 tonnes MPO N/A
n-Hexane 110-54-3 Part 1A 10 tonnes MPO VOC
Hydrochloric acid 7647-01-0 Part 1A 10 tonnes MPO N/A
Hydrogen cyanide 74-90-8 Part 1A 10 tonnes MPO N/A
Hydrogen fluoride 7664-39-3 Part 1A 10 tonnes MPO N/A
Hydrogen sulphide 7783-06-4 Part 1A 10 tonnes MPO N/A
Hydroquinone (and its salts)Footnote 1 123-31-9 Part 1A 10 tonnes MPO N/A
Iron pentacarbonyl 13463-40-6 Part 1A 10 tonnes MPO N/A
Isobutyraldehyde 78-84-2 Part 1A 10 tonnes MPO VOC
Isophorone diisocyanate 4098-71-9 Part 1A 10 tonnes MPO N/A
Isopropyl alcohol 67-63-0 Part 1A 10 tonnes MPO VOC
Lithium carbonate 554-13-2 Part 1A 10 tonnes MPO N/A
Maleic anhydride 108-31-6 Part 1A 10 tonnes MPO VOC
Manganese (and its compounds)Footnote 3 NA - 09 Part 1A 10 tonnes MPO N/A
2-Mercaptobenzothiazole 149-30-4 Part 1A 10 tonnes MPO N/A
Methanol 67-56-1 Part 1A 10 tonnes MPO VOC
2-Methoxyethanol 109-86-4 Part 1A 10 tonnes MPO VOC
2-(2-Methoxyethoxy)ethanol 111-77-3 Part 1A 10 tonnes MPO N/A
2-Methoxyethyl acetate 110-49-6 Part 1A 10 tonnes MPO VOC
Methyl acrylate 96-33-3 Part 1A 10 tonnes MPO VOC
Methyl tert-butyl ether 1634-04-4 Part 1A 10 tonnes MPO VOC
p,p'-Methylene bis(2-chloroaniline) 101-14-4 Part 1A 10 tonnes MPO VOC
1,1-Methylene bis(4-isocyanatocyclohexane) 5124-30-1 Part 1A 10 tonnes MPO N/A
Methylene bis(phenylisocyanate) 101-68-8 Part 1A 10 tonnes MPO VOC
p,p'-Methylenedianiline 101-77-9 Part 1A 10 tonnes MPO VOC
Methyl ethyl ketone 78-93-3 Part 1A 10 tonnes MPO VOC
Methyl iodide 74-88-4 Part 1A 10 tonnes MPO N/A
Methyl isobutyl ketone 108-10-1 Part 1A 10 tonnes MPO VOC
Methyl methacrylate 80-62-6 Part 1A 10 tonnes MPO VOC
N-Methylolacrylamide 924-42-5 Part 1A 10 tonnes MPO N/A
N-Methyl-2-pyrrolidone 872-50-4 Part 1A 10 tonnes MPO VOC
Michler’s ketone (and its salts)Footnote 1 90-94-8 Part 1A 10 tonnes MPO N/A
Molybdenum trioxide 1313-27-5 Part 1A 10 tonnes MPO N/A
Naphthalene 91-20-3 Part 1A 10 tonnes MPO VOC, PAH
Naphthenic acid fraction compounds (and their salts)Footnote 1Footnote 9 NA - 47
Part 1A 10 tonnes MPO
N/A
Nickel (and its compounds)Footnote 3 NA - 11 Part 1A 10 tonnes MPO N/A
Nitrate ionFootnote 10 NA - 17 Part 1A 10 tonnes MPO N/A
Nitric acid 7697-37-2 Part 1A 10 tonnes MPO N/A
Nitrilotriacetic acid (and its salts)Footnote 1 139-13-9 Part 1A 10 tonnes MPO N/A
Nitroglycerin 55-63-0 Part 1A 10 tonnes MPO N/A
2-Nitropropane 79-46-9 Part 1A 10 tonnes MPO N/A
N-Nitrosodiphenylamine 86-30-6 Part 1A 10 tonnes MPO N/A
Octylphenol and its ethoxylatesFootnote 11 NA - 21 Part 1A 10 tonnes MPO VOC
Peracetic acid (and its salts)Footnote 1 79-21-0 Part 1A 10 tonnes MPO VOC
Phenol (and its salts)Footnote 1 108-95-2 Part 1A 10 tonnes MPO VOC
p-Phenylenediamine (and its salts)Footnote 1 106-50-3 Part 1A 10 tonnes MPO N/A
Phosgene 75-44-5 Part 1A 10 tonnes MPO N/A
Phosphorus (yellow or white only) 7723-14-0 Part 1A 10 tonnes MPO N/A
Phosphorus (total)Footnote 12 NA - 22 Part 1A 10 tonnes MPO N/A
Phthalic anhydride 85-44-9 Part 1A 10 tonnes MPO VOC
Polymeric diphenylmethane diisocyanate 9016-87-9 Part 1A 10 tonnes MPO N/A
Potassium bromate 7758-01-2 Part 1A 10 tonnes MPO N/A
Propionaldehyde 123-38-6 Part 1A 10 tonnes MPO VOC
Propylene 115-07-1 Part 1A 10 tonnes MPO VOC
Propylene oxide 75-56-9 Part 1A 10 tonnes MPO VOC
Pyridine (and its salts)Footnote 1 110-86-1 Part 1A 10 tonnes MPO VOC
Silver (and its compounds)Footnote 3 NA - 13 Part 1A 10 tonnes MPO N/A
Sodium fluoride 7681-49-4 Part 1A 10 tonnes MPO N/A
Sodium nitrite 7632-00-0 Part 1A 10 tonnes MPO N/A
Styrene 100-42-5 Part 1A 10 tonnes MPO VOC
Sulphuric acid 7664-93-9 Part 1A 10 tonnes MPO N/A
1,1,1,2-Tetrachloroethane 630-20-6 Part 1A 10 tonnes MPO N/A
1,1,2,2-Tetrachloroethane 79-34-5 Part 1A 10 tonnes MPO VOC
Tetrachloroethylene 127-18-4 Part 1A 10 tonnes MPO N/A
Thiourea 62-56-6 Part 1A 10 tonnes MPO N/A
Thorium dioxide 1314-20-1 Part 1A 10 tonnes MPO N/A
Titanium tetrachloride 7550-45-0 Part 1A 10 tonnes MPO N/A
Toluene 108-88-3 Part 1A 10 tonnes MPO VOC
Total reduced sulphur (expressed as hydrogen sulphide)Footnote 13 NA - M14 Part 1A 10 tonnes MPO N/A
1,2,4-Trichlorobenzene 120-82-1 Part 1A 10 tonnes MPO N/A
1,1,2-Trichloroethane 79-00-5 Part 1A 10 tonnes MPO VOC
Trichloroethylene 79-01-6 Part 1A 10 tonnes MPO VOC
Triethylamine 121-44-8 Part 1A 10 tonnes MPO VOC
1,2,4-Trimethylbenzene 95-63-6 Part 1A 10 tonnes MPO VOC
2,2,4-Trimethylhexamethylene diisocyanate 16938-22-0 Part 1A 10 tonnes MPO N/A
Vanadium (and its compounds)Footnote 14 NA-40
Part 1A 10 tonnes MPO N/A
Vinyl acetate 108-05-4 Part 1A 10 tonnes MPO VOC
Vinyl chloride 75-01-4 Part 1A 10 tonnes MPO VOC
Xylene (all isomers)Footnote 15 1330-20-7 Part 1A 10 tonnes MPO VOC
Zinc (and its compounds)Footnote 3 NA - 14 Part 1A 10 tonnes MPO N/A
Acrylonitrile 107-13-1 Part 1B 1000 kg MPO VOC
Arsenic (and its compounds)Footnote 3 NA - 02 Part 1B 50 kg MPO N/A
Azo disperse dyes Footnote 16
NA - 46 Part 1B 10 kg MPO
N/A
1,4-Benzenediamine, N,N’-mixed phenyl and tolyl derivatives 68953-84-4 Part 1B 50 kg MPO
N/A
Bisphenol A 80-05-7 Part 1B 100 kg MPO N/A
Cadmium (and its compounds)Footnote 3 NA - 03 Part 1B 5 kg MPO N/A
Chlorinated alkanes, medium-chain, CnHxCl(2n+2–x), 14 ≤ n ≤ 17Footnote 17 NA - 38 Part 1B 1000 kg MPO N/A
Chlorinated alkanes, long-chain, CnHxCl(2n+2–x), 18 ≤ n ≤ 20Footnote 18 NA - 39 Part 1B 1000 kg MPO N/A
Cobalt (and its compounds)Footnote 3 NA - 05 Part 1B 50 kg MPO N/A
Hexavalent chromium (and its compounds)Footnote 3 NA - 19 Part 1B 50 kg MPO N/A
Hydrazine (and its salts)Footnote 1 302-01-2 Part 1B 1000 kg MPO N/A
Isoprene 78-79-5 Part 1B 100 kg MPO VOC
Lead (and its compounds)Footnote 19 NA - 08 Part 1B 50 kg MPO N/A
Mercury (and its compounds)Footnote 3 NA - 10 Part 1B 5 kg MPO N/A
Nonylphenol and its ethoxylatesFootnote 20 NA - 20 Part 1B 1000 kg MPO VOC
2-Propanone, reaction products with diphenylamine 68412-48-6 Part 1B 50 kg MPO
N/A
Selenium (and its compounds)Footnote 3 NA - 12 Part 1B 100 kg MPO N/A
Tetraethyl lead 78-00-2 Part 1B 50 kg MPO N/A
Thallium (and its compounds)Footnote 3 NA - 37 Part 1B 100 kg MPO N/A
Toluene-2,4-diisocyanate 584-84-9 Part 1B 100 kg MPO VOC
Toluene-2,6-diisocyanate 91-08-7 Part 1B 100 kg MPO VOC
Toluenediisocyanate (mixed isomers)Footnote 21 26471-62-5 Part 1B 100 kg MPO VOC
Acenaphthene 83-32-9 Part 2 50 kg total PAHs VOC, PAH
Acenaphthylene 208-96-8 Part 2 50 kg total PAHs VOC, PAH
Anthracene 120-12-7 Part 2 50 kg total PAHs VOC, PAH
Benz[a]anthracene 56-55-3 Part 2 50 kg total PAHs VOC, PAH
Benzo[a]pyrene 50-32-8 Part 2 50 kg total PAHs VOC, PAH
Benzo[b]fluoranthene 205-99-2 Part 2 50 kg total PAHs VOC, PAH
Benzo[e]pyrene 192-97-2 Part 2 50 kg total PAHs VOC, PAH
Benzo[ghi]perylene 191-24-2 Part 2 50 kg total PAHs VOC, PAH
Benzo[j]fluoranthene 205-82-3 Part 2 50 kg total PAHs VOC, PAH
Benzo[k]fluoranthene 207-08-9 Part 2 50 kg total PAHs VOC, PAH
Chrysene 218-01-9 Part 2 50 kg total PAHs VOC, PAH
Dibenz[a,h]acridine 226-36-8 Part 2 50 kg total PAHs VOC, PAH
Dibenz[a,h]anthracene 53-70-3 Part 2 50 kg total PAHs VOC, PAH
Dibenz[a,j]acridine 224-42-0 Part 2 50 kg total PAHs VOC, PAH
Dibenzo[a,e]fluoranthene 5385-75-1 Part 2 50 kg total PAHs VOC, PAH
Dibenzo[a,e]pyrene 192-65-4 Part 2 50 kg total PAHs VOC, PAH
Dibenzo[a,h]pyrene 189-64-0 Part 2 50 kg total PAHs VOC, PAH
Dibenzo[a,i]pyrene 189-55-9 Part 2 50 kg total PAHs VOC, PAH
Dibenzo[a,l]pyrene 191-30-0 Part 2 50 kg total PAHs VOC, PAH
7H-Dibenzo[c,g]carbazole 194-59-2 Part 2 50 kg total PAHs VOC, PAH
7,12-Dimethylbenz[a]anthracene 57-97-6 Part 2 50 kg total PAHs VOC, PAH
Fluoranthene 206-44-0 Part 2 50 kg total PAHs VOC, PAH
Fluorene 86-73-7 Part 2 50 kg total PAHs VOC, PAH
Indeno[1,2,3-cd]pyrene 193-39-5 Part 2 50 kg total PAHs VOC, PAH
3-Methylcholanthrene 56-49-5 Part 2 50 kg total PAHs VOC, PAH
5-Methylchrysene 3697-24-3 Part 2 50 kg total PAHs VOC, PAH
1-Nitropyrene 5522-43-0 Part 2 50 kg total PAHs VOC, PAH
Perylene 198-55-0 Part 2 50 kg total PAHs VOC, PAH
Phenanthrene 85-01-8 Part 2 50 kg total PAHs VOC, PAH
Pyrene 129-00-0 Part 2 50 kg total PAHs VOC, PAH
Quinoline 91-22-5 Part 2 50 kg total PAHs VOC, PAH
2,3,7,8-Tetrachlorodibenzo-p-dioxin 1746-01-6 Part 3 Activity-based N/A
1,2,3,7,8-Pentachlorodibenzo-p-dioxin 40321-76-4 Part 3 Activity-based N/A
1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 39227-28-6 Part 3 Activity-based N/A
1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 19408-74-3 Part 3 Activity-based N/A
1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 57653-85-7 Part 3 Activity-based N/A
1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 35822-46-9 Part 3 Activity-based N/A
Octachlorodibenzo-p-dioxin 3268-87-9 Part 3 Activity-based N/A
2,3,7,8-Tetrachlorodibenzofuran 51207-31-9 Part 3 Activity-based N/A
2,3,4,7,8-Pentachlorodibenzofuran 57117-31-4 Part 3 Activity-based N/A
1,2,3,7,8-Pentachlorodibenzofuran 57117-41-6 Part 3 Activity-based N/A
1,2,3,4,7,8-Hexachlorodibenzofuran 70648-26-9 Part 3 Activity-based N/A
1,2,3,7,8,9-Hexachlorodibenzofuran 72918-21-9 Part 3 Activity-based N/A
1,2,3,6,7,8-Hexachlorodibenzofuran 57117-44-9 Part 3 Activity-based N/A
2,3,4,6,7,8-Hexachlorodibenzofuran 60851-34-5 Part 3 Activity-based N/A
1,2,3,4,6,7,8-Heptachlorodibenzofuran 67562-39-4 Part 3 Activity-based N/A
1,2,3,4,7,8,9-Heptachlorodibenzofuran 55673-89-7 Part 3 Activity-based N/A
Octachlorodibenzofuran 39001-02-0 Part 3 Activity-based N/A
Hexachlorobenzene 118-74-1 Part 3 Activity-based N/A
Carbon monoxide 630-08-0 Part 4 20 tonnes release N/A
Nitrogen oxides (expressed as nitrogen dioxide) 11104-93-1 Part 4 20 tonnes release N/A
PM2.5Footnote 22Footnote 23 NA - M10 Part 4 0.3 tonnes release N/A
PM10Footnote 23Footnote 24 NA - M09 Part 4 0.5 tonnes release N/A
Sulphur dioxide 7446-09-5 Part 4 20 tonnes release N/A
Total Particulate MatterFootnote 23Footnote 25 NA - M08 Part 4 20 tonnes release N/A
Volatile Organic Compounds (VOCs)Footnote 26 NA - M16 Part 4 10 tonnes release VOC
Acetylene 74-86-2 Part 5 1 tonne air release VOC
Benzene 71-43-2 Part 5 1 tonne air release VOC
1,3-Butadiene 106-99-0 Part 5 1 tonne air release VOC
2-Butoxyethanol 111-76-2 Part 5 1 tonne air release VOC
p-Dichlorobenzene 106-46-7 Part 5 1 tonne air release VOC
1,2-Dichloroethane 107-06-2 Part 5 1 tonne air release VOC
Dimethylether 115-10-6 Part 5 1 tonne air release VOC
Ethanol 64-17-5 Part 5 1 tonne air release VOC
Ethyl acetate 141-78-6 Part 5 1 tonne air release VOC
Ethylene 74-85-1 Part 5 1 tonne air release VOC
Formaldehyde 50-00-0 Part 5 1 tonne air release VOC
Furfuryl alcohol 98-00-0 Part 5 1 tonne air release VOC
n-Hexane 110-54-3 Part 5 1 tonne air release VOC
Isopropyl alcohol 67-63-0 Part 5 1 tonne air release VOC
D-Limonene 5989-27-5 Part 5 1 tonne air release VOC
Methanol 67-56-1 Part 5 1 tonne air release VOC
Methyl ethyl ketone 78-93-3 Part 5 1 tonne air release VOC
Methylcyclopentane 96-37-7 Part 5 1 tonne air release VOC
Methyl isobutyl ketone 108-10-1 Part 5 1 tonne air release VOC
Myrcene 123-35-3 Part 5 1 tonne air release VOC
beta-Phellandrene 555-10-2 Part 5 1 tonne air release VOC
alpha-Pinene 80-56-8 Part 5 1 tonne air release VOC
beta-Pinene 127-91-3 Part 5 1 tonne air release VOC
Propane 74-98-6 Part 5 1 tonne air release VOC
n-Propyl alcohol 71-23-8 Part 5 1 tonne air release VOC
Propylene 115-07-1 Part 5 1 tonne air release VOC
Styrene 100-42-5 Part 5 1 tonne air release VOC
Tetrahydrofuran 109-99-9 Part 5 1 tonne air release VOC
Toluene 108-88-3 Part 5 1 tonne air release VOC
1,2,4-Trimethylbenzene 95-63-6 Part 5 1 tonne air release VOC
Vinyl acetate 108-05-4 Part 5 1 tonne air release VOC
Butane (all isomers) NA - 24 Part 5 1 tonne air release VOC
Butene (all isomers) 25167-67-3 Part 5 1 tonne air release VOC
Butyl acetate Footnote 27 NA – 41 Part 5 1 tonne air release VOC
Cycloheptane (all isomers)
NA - 25 Part 5 1 tonne air release VOC
Cyclohexene (all isomers)
NA - 26 Part 5 1 tonne air release VOC
Cyclooctane (all isomers)
NA - 27 Part 5 1 tonne air release VOC
Decane (all isomers) NA - 28 Part 5 1 tonne air release VOC
Ethyltoluene (all isomers) NA – 42 Part 5 1 tonne air release VOC
Heptane (all isomers) NA - 31 Part 5 1 tonne air release VOC
HexaneFootnote 28 NA - 32 Part 5 1 tonne air release VOC
Hexene (all isomers) 25264-93-1 Part 5 1 tonne air release VOC
Nonane (all isomers) NA - 33 Part 5 1 tonne air release VOC
Octane (all isomers) NA - 34 Part 5 1 tonne air release VOC
Pentane (all isomers) NA - 35 Part 5 1 tonne air release VOC
Pentene (all isomers) NA - 36 Part 5 1 tonne air release VOC
Propyl acetate (all isomers) NA – 43 Part 5 1 tonne air release VOC
Propylene glycol methyl ether acetate (all isomers)
108-65-6 Part 5 1 tonne air release VOC
TrimethylbenzeneFootnote 29 25551-13-7 Part 5 1 tonne air release VOC
Xylene (all isomers)Footnote 15 
1330-20-7 Part 5 1 tonne air release VOC
Analytically unresolved hydrocarbons (C10 to C16+)Footnote 30 NA - 44 Part 5 1 tonne air release VOC
Heavy aromatic solvent naphtha 64742-94-5 Part 5 1 tonne air release VOC
Hydrotreated heavy naphtha 64742-48-9 Part 5 1 tonne air release VOC
Hydrotreated light distillate 64742-47-8 Part 5 1 tonne air release VOC
Light aromatic solvent naphtha 64742-95-6 Part 5 1 tonne air release VOC
Mineral spirits 64475-85-0 Part 5 1 tonne air release VOC
Naphtha 8030-30-6 Part 5 1 tonne air release VOC
Other glycol ethers and acetates (and their isomers)Footnote 31 NA - 45 Part 5 1 tonne air release VOC
Solvent naphtha light aliphatic 64742-89-8 Part 5 1 tonne air release
VOC
Solvent naphtha medium aliphatic 64742-88-7 Part 5 1 tonne air release
VOC
Stoddard solvent 8052-41-3 Part 5 1 tonne air release VOC
VM & P naphtha 8032-32-4 Part 5 1 tonne air release VOC
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