Substance list by threshold

The substance list below is sorted by NPRI Threshold Category. To sort the list by other criteria, such as by name, please download the Excel format (76 KB) of the current substance list. To search for a particular substance or CAS Registry Number on this page, press crtl+f.

General Notes:

Abbreviations:

MPO = Manufactured, Processed or Otherwise used

PAHs = Polycyclic aromatic hydrocarbons

VOCs = Volatile Organic Compounds

† The Chemical Abstracts Service (CAS) Registry Number (CAS RN) is the property of the American Chemical Society and any use or redistribution, 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, is not permitted without the prior, written permission of the American Chemical Society.

* Other Substance Identifiers (i.e., NA - ##) are used where no single CAS RN applies to a substance.

2016-2017 NPRI Substance List

Prefix	Name	CAS #^†or Other Substance Identifier*	Part # (Threshold Category)	Threshold^**	Group
	Acetaldehyde	75-07-0	1A	10 tonnes MPO	VOC
	Acetonitrile	75-05-8	1A	10 tonnes MPO	VOC
	Acetophenone	98-86-2	1A	10 tonnes MPO	VOC
	Acrolein	107-02-8	1A	10 tonnes MPO	VOC
	Acrylamide	79-06-1	1A	10 tonnes MPO	VOC
	Acrylic acid (and its salts)¹	79-10-7	1A	10 tonnes MPO	VOC
	Alkanes, C_10-13, chloro	85535-84-8	1A	10 tonnes MPO
	Alkanes, C_6-18, chloro	68920-70-7	1A	10 tonnes MPO
	Allyl alcohol	107-18-6	1A	10 tonnes MPO	VOC
	Aluminum (fume or dust only)	7429-90-5	1A	10 tonnes MPO
	Aluminum oxide (fibrous forms only)	1344-28-1	1A	10 tonnes MPO
	Ammonia (total)²	NA - 16	1A	10 tonnes MPO
	Aniline (and its salts)¹	62-53-3	1A	10 tonnes MPO	VOC
	Anthracene	120-12-7	1A	10 tonnes MPO	VOC, PAH
	Antimony (and its compounds)³	NA - 01	1A	10 tonnes MPO
	Asbestos (friable form only)	1332-21-4	1A	10 tonnes MPO
	Benzene	71-43-2	1A	10 tonnes MPO	VOC
	Benzoyl chloride	98-88-4	1A	10 tonnes MPO
	Benzoyl peroxide	94-36-0	1A	10 tonnes MPO
	Benzyl chloride	100-44-7	1A	10 tonnes MPO	VOC
	Biphenyl	92-52-4	1A	10 tonnes MPO	VOC
	Bis (2-ethylhexyl) adipate	103-23-1	1A	10 tonnes MPO
	Bis (2-ethylhexyl) phthalate	117-81-7	1A	10 tonnes MPO
	Boron trifluoride	7637-07-2	1A	10 tonnes MPO
	Bromine	7726-95-6	1A	10 tonnes MPO
	Bromomethane	74-83-9	1A	10 tonnes MPO	VOC
1,3-	Butadiene	106-99-0	1A	10 tonnes MPO	VOC
2-	Butoxyethanol	111-76-2	1A	10 tonnes MPO	VOC
	Butyl acrylate	141-32-2	1A	10 tonnes MPO	VOC
sec-	Butyl alcohol	78-92-2	1A	10 tonnes MPO	VOC
i-	Butyl alcohol	78-83-1	1A	10 tonnes MPO	VOC
n-	Butyl alcohol	71-36-3	1A	10 tonnes MPO	VOC
tert-	Butyl alcohol	75-65-0	1A	10 tonnes MPO	VOC
	Butyl benzyl phthalate	85-68-7	1A	10 tonnes MPO	VOC
1,2-	Butylene oxide	106-88-7	1A	10 tonnes MPO	VOC
	Butyraldehyde	123-72-8	1A	10 tonnes MPO	VOC
	C.I. Basic Green 4	569-64-2	1A	10 tonnes MPO
	C.I. Disperse Yellow 3	2832-40-8	1A	10 tonnes MPO
	C.I. Solvent Yellow 14	842-07-9	1A	10 tonnes MPO
	Calcium fluoride	7789-75-5	1A	10 tonnes MPO
	Carbon disulphide	75-15-0	1A	10 tonnes MPO	VOC
	Carbon tetrachloride	56-23-5	1A	10 tonnes MPO	VOC
	Carbonyl sulphide	463-58-1	1A	10 tonnes MPO
	Catechol	120-80-9	1A	10 tonnes MPO
	CFC-11	75-69-4	1A	10 tonnes MPO
	CFC-114	76-14-2	1A	10 tonnes MPO
	CFC-115	76-15-3	1A	10 tonnes MPO
	CFC-12	75-71-8	1A	10 tonnes MPO
	CFC-13	75-72-9	1A	10 tonnes MPO	VOC
	Chlorine	7782-50-5	1A	10 tonnes MPO
	Chlorine dioxide	10049-04-4	1A	10 tonnes MPO
	Chloroacetic acid (and its salts)¹	79-11-8	1A	10 tonnes MPO
	Chlorobenzene	108-90-7	1A	10 tonnes MPO	VOC
	Chloroethane	75-00-3	1A	10 tonnes MPO	VOC
	Chloroform	67-66-3	1A	10 tonnes MPO	VOC
	Chloromethane	74-87-3	1A	10 tonnes MPO	VOC
3-	Chloropropionitrile	542-76-7	1A	10 tonnes MPO
	Chromium (and its compounds)⁴	NA - 04	1A	10 tonnes MPO
	Copper (and its compounds)³	NA - 06	1A	10 tonnes MPO
	Cresol (all isomers, and their salts)^1,5	1319-77-3	1A	10 tonnes MPO	VOC
	Crotonaldehyde	4170-30-3	1A	10 tonnes MPO
	Cumene	98-82-8	1A	10 tonnes MPO	VOC
	Cumene hydroperoxide	80-15-9	1A	10 tonnes MPO
	Cyanides (ionic)	NA - 07	1A	10 tonnes MPO
	Cyclohexane	110-82-7	1A	10 tonnes MPO	VOC
	Cyclohexanol	108-93-0	1A	10 tonnes MPO	VOC
	Decabromodiphenyl oxide	1163-19-5	1A	10 tonnes MPO
	Di- n -octyl phthalate	117-84-0	1A	10 tonnes MPO
2,6-	Di- t-butyl-4-methylphenol	128-37-0	1A	10 tonnes MPO
2,4-	Diaminotoluene (and its salts) ¹	95-80-7	1A	10 tonnes MPO
	Dibutyl phthalate	84-74-2	1A	10 tonnes MPO	VOC
p-	Dichlorobenzene	106-46-7	1A	10 tonnes MPO	VOC
o-	Dichlorobenzene	95-50-1	1A	10 tonnes MPO	VOC
3,3'-	Dichlorobenzidine dihydrochloride	612-83-9	1A	10 tonnes MPO
1,2-	Dichloroethane	107-06-2	1A	10 tonnes MPO	VOC
	Dichloromethane	75-09-2	1A	10 tonnes MPO
2,4-	Dichlorophenol (and its salts) ¹	120-83-2	1A	10 tonnes MPO
1,2-	Dichloropropane	78-87-5	1A	10 tonnes MPO	VOC
	Dicyclopentadiene	77-73-6	1A	10 tonnes MPO	VOC
	Diethanolamine (and its salts) ¹	111-42-2	1A	10 tonnes MPO
	Diethyl phthalate	84-66-2	1A	10 tonnes MPO
	Diethyl sulphate	64-67-5	1A	10 tonnes MPO
	Dimethyl phthalate	131-11-3	1A	10 tonnes MPO	VOC
	Dimethyl sulphate	77-78-1	1A	10 tonnes MPO
	Dimethylamine	124-40-3	1A	10 tonnes MPO	VOC
N,N-	Dimethylaniline (and its salts) ¹	121-69-7	1A	10 tonnes MPO
N,N-	Dimethylformamide	68-12-2	1A	10 tonnes MPO	VOC
4,6-	Dinitro- o -cresol (and its salts) ¹	534-52-1	1A	10 tonnes MPO
2,4-	Dinitrotoluene	121-14-2	1A	10 tonnes MPO
1,4-	Dioxane	123-91-1	1A	10 tonnes MPO	VOC
	Diphenylamine	122-39-4	1A	10 tonnes MPO	VOC
	Epichlorohydrin	106-89-8	1A	10 tonnes MPO	VOC
2	Ethoxyethanol	110-80-5	1A	10 tonnes MPO	VOC
2-	Ethoxyethyl acetate	111-15-9	1A	10 tonnes MPO	VOC
	Ethyl acrylate	140-88-5	1A	10 tonnes MPO	VOC
	Ethylbenzene	100-41-4	1A	10 tonnes MPO	VOC
	Ethylene	74-85-1	1A	10 tonnes MPO	VOC
	Ethylene glycol	107-21-1	1A	10 tonnes MPO	VOC
	Ethylene oxide	75-21-8	1A	10 tonnes MPO	VOC
	Ethylene thiourea	96-45-7	1A	10 tonnes MPO
	Fluorine	7782-41-4	1A	10 tonnes MPO
	Formaldehyde	50-00-0	1A	10 tonnes MPO	VOC
	Formic acid	64-18-6	1A	10 tonnes MPO	VOC
	Halon 1211	353-59-3	1A	10 tonnes MPO
	Halon 1301	75-63-8	1A	10 tonnes MPO
	HCFC-122 (all isomers) ⁶	41834-16-6	1A	10 tonnes MPO
	HCFC-123 (all isomers) ⁷	34077-87-7	1A	10 tonnes MPO
	HCFC-124 (all isomers) ⁸	63938-10-3	1A	10 tonnes MPO
	HCFC-141b	1717-00-6	1A	10 tonnes MPO
	HCFC-142b	75-68-3	1A	10 tonnes MPO
	HCFC-22	75-45-6	1A	10 tonnes MPO
	Hexachlorocyclopentadiene	77-47-4	1A	10 tonnes MPO
	Hexachlorophene	70-30-4	1A	10 tonnes MPO
n-	Hexane	110-54-3	1A	10 tonnes MPO	VOC
	Hydrochloric acid	7647-01-0	1A	10 tonnes MPO
	Hydrogen cyanide	74-90-8	1A	10 tonnes MPO
	Hydrogen fluoride	7664-39-3	1A	10 tonnes MPO
	Hydrogen sulphide	7783-06-4	1A	10 tonnes MPO
	Hydroquinone (and its salts) ¹	123-31-9	1A	10 tonnes MPO
	Iron pentacarbonyl	13463-40-6	1A	10 tonnes MPO
	Isobutyraldehyde	78-84-2	1A	10 tonnes MPO	VOC
	Isophorone diisocyanate	4098-71-9	1A	10 tonnes MPO
	Isopropyl alcohol	67-63-0	1A	10 tonnes MPO	VOC
	Lithium carbonate	554-13-2	1A	10 tonnes MPO
	Maleic anhydride	108-31-6	1A	10 tonnes MPO	VOC
	Manganese (and its compounds)³	NA - 09	1A	10 tonnes MPO
2-	Mercaptobenzothiazole	149-30-4	1A	10 tonnes MPO
	Methanol	67-56-1	1A	10 tonnes MPO	VOC
2-	Methoxyethanol	109-86-4	1A	10 tonnes MPO	VOC
2-(2-	Methoxyethoxy)ethanol	111-77-3	1A	10 tonnes MPO
2-	Methoxyethyl acetate	110-49-6	1A	10 tonnes MPO	VOC
	Methyl acrylate	96-33-3	1A	10 tonnes MPO	VOC
	Methyl ethyl ketone	78-93-3	1A	10 tonnes MPO	VOC
	Methyl iodide	74-88-4	1A	10 tonnes MPO
	Methyl isobutyl ketone	108-10-1	1A	10 tonnes MPO	VOC
	Methyl methacrylate	80-62-6	1A	10 tonnes MPO	VOC
	Methyl tert-butyl ether	1634-04-4	1A	10 tonnes MPO	VOC
N-	Methyl-2-pyrrolidone	872-50-4	1A	10 tonnes MPO	VOC
p,p'-	Methylene bis(2-chloroaniline)	101-14-4	1A	10 tonnes MPO	VOC
1,1-	Methylene bis(4-isocyanatocyclohexane)	5124-30-1	1A	10 tonnes MPO
	Methylene bis(phenylisocyanate)	101-68-8	1A	10 tonnes MPO	VOC
p,p'-	Methylenedianiline	101-77-9	1A	10 tonnes MPO	VOC
N-	Methylolacrylamide	924-42-5	1A	10 tonnes MPO
2-	Methylpyridine	109-06-8	1A	10 tonnes MPO
	Michler’s ketone (and its salts) ¹	90-94-8	1A	10 tonnes MPO
	Molybdenum trioxide	1313-27-5	1A	10 tonnes MPO
	Naphthalene	91-20-3	1A	10 tonnes MPO	VOC, PAH
	Nickel (and its compounds)³	NA - 11	1A	10 tonnes MPO
	Nitrate ion ⁹	NA - 17	1A	10 tonnes MPO
	Nitric acid	7697-37-2	1A	10 tonnes MPO
	Nitrilotriacetic acid (and its salts) ¹	139-13-9	1A	10 tonnes MPO
p-	Nitroaniline	100-01-6	1A	10 tonnes MPO
	Nitrobenzene	98-95-3	1A	10 tonnes MPO	VOC
	Nitroglycerin	55-63-0	1A	10 tonnes MPO
2-	Nitropropane	79-46-9	1A	10 tonnes MPO
N-	Nitrosodiphenylamine	86-30-6	1A	10 tonnes MPO
	Octylphenol and its ethoxylates ¹⁰	NA - 21	1A	10 tonnes MPO	VOC
	Peracetic acid (and its salts) ¹	79-21-0	1A	10 tonnes MPO	VOC
	Phenol (and its salts) ¹	108-95-2	1A	10 tonnes MPO	VOC
p-	Phenylenediamine (and its salts) ¹	106-50-3	1A	10 tonnes MPO
	Phosgene	75-44-5	1A	10 tonnes MPO
	Phosphorus (total) ¹¹	NA - 22	1A	10 tonnes MPO
	Phosphorus (yellow or white only)	7723-14-0	1A	10 tonnes MPO
	Phthalic anhydride	85-44-9	1A	10 tonnes MPO	VOC
	Polymeric diphenylmethane diisocyanate	9016-87-9	1A	10 tonnes MPO
	Potassium bromate	7758-01-2	1A	10 tonnes MPO
	Propionaldehyde	123-38-6	1A	10 tonnes MPO	VOC
	Propylene	115-07-1	1A	10 tonnes MPO	VOC
	Propylene oxide	75-56-9	1A	10 tonnes MPO	VOC
	Pyridine (and its salts) ¹	110-86-1	1A	10 tonnes MPO	VOC
	Silver (and its compounds)³	NA - 13	1A	10 tonnes MPO
	Sodium fluoride	7681-49-4	1A	10 tonnes MPO
	Sodium nitrite	7632-00-0	1A	10 tonnes MPO
	Styrene	100-42-5	1A	10 tonnes MPO	VOC
	Sulphuric acid	7664-93-9	1A	10 tonnes MPO
1,1,2,2-	Tetrachloroethane	79-34-5	1A	10 tonnes MPO	VOC
1,1,1,2-	Tetrachloroethane	630-20-6	1A	10 tonnes MPO
	Tetrachloroethylene	127-18-4	1A	10 tonnes MPO
	Thiourea	62-56-6	1A	10 tonnes MPO
	Thorium dioxide	1314-20-1	1A	10 tonnes MPO
	Titanium tetrachloride	7550-45-0	1A	10 tonnes MPO
	Toluene	108-88-3	1A	10 tonnes MPO	VOC
	Total reduced sulphur (expressed as hydrogen sulphide) ¹²	NA - M14	1A	10 tonnes MPO
1,2,4-	Trichlorobenzene	120-82-1	1A	10 tonnes MPO
1,1,2-	Trichloroethane	79-00-5	1A	10 tonnes MPO	VOC
	Trichloroethylene	79-01-6	1A	10 tonnes MPO	VOC
	Triethylamine	121-44-8	1A	10 tonnes MPO	VOC
1,2,4-	Trimethylbenzene	95-63-6	1A	10 tonnes MPO	VOC
2,2,4-	Trimethylhexamethylene diisocyanate	16938-22-0	1A	10 tonnes MPO
2,4,4-	Trimethylhexamethylene diisocyanate	15646-96-5	1A	10 tonnes MPO
	Vanadium (and its compounds) ¹³	7440-62-2	1A	10 tonnes MPO
	Vinyl acetate	108-05-4	1A	10 tonnes MPO	VOC
	Vinyl chloride	75-01-4	1A	10 tonnes MPO	VOC
	Xylene (all isomers) ¹⁴	1330-20-7	1A	10 tonnes MPO	VOC
	Zinc (and its compounds) ³	NA - 14	1A	10 tonnes MPO
	Acrylonitrile	107-13-1	1B	1000 kg MPO	VOC
	Arsenic (and its compounds) ³	NA - 02	1B	50 kg MPO
	Bisphenol A	80-05-7	1B	100 kg MPO
	Cadmium (and its compounds) ³	NA - 03	1B	5 kg MPO
	Cobalt (and its compounds)³	NA - 05	1B	50 kg MPO
	Hexavalent chromium (and its compounds) ³	NA - 19	1B	50 kg MPO
	Hydrazine (and its salts) ¹	302-01-2	1B	1000 kg MPO
	Isoprene	78-79-5	1B	100 kg MPO	VOC
	Lead (and its compounds) ¹⁵	NA - 08	1B	50 kg MPO
	Mercury (and its compounds)³	NA - 10	1B	5 kg MPO
	Nonylphenol and its ethoxylates ¹⁶	NA - 20	1B	1000 kg MPO	VOC
	Selenium (and its compounds) ³	NA - 12	1B	100 kg MPO
	Thallium (and its compounds) ³	NA - 37	1B	100 kg MPO
	Tetraethyl lead	78-00-2	1B	50 kg MPO
	Toluene-2,4-diisocyanate	584-84-9	1B	100 kg MPO
	Toluene-2,6-diisocyanate	91-08-7	1B	100 kg MPO	VOC
	Toluenediisocyanate (mixed isomers)	26471-62-5	1B	100 kg MPO
	Acenaphthene	83-32-9	2	50 kg total PAHs	VOC, PAH
	Acenaphthylene	208-96-8	2	50 kg total PAHs	VOC, PAH
	Benzo(a)anthracene	56-55-3	2	50 kg total PAHs	VOC, PAH
	Benzo(a)phenanthrene	218-01-9	2	50 kg total PAHs	VOC, PAH
	Benzo(a)pyrene	50-32-8	2	50 kg total PAHs	VOC, PAH
	Benzo(b)fluoranthene	205-99-2	2	50 kg total PAHs	VOC, PAH
	Benzo(e)pyrene	192-97-2	2	50 kg total PAHs	VOC, PAH
	Benzo(g,h,i)perylene	191-24-2	2	50 kg total PAHs	VOC, PAH
	Benzo(j)fluoranthene	205-82-3	2	50 kg total PAHs	VOC, PAH
	Benzo(k)fluoranthene	207-08-9	2	50 kg total PAHs	VOC, PAH
	Dibenz(a,j)acridine	224-42-0	2	50 kg total PAHs	VOC, PAH
	Dibenzo(a,e)fluoranthene	5385-75-1	2	50 kg total PAHs	VOC, PAH
	Dibenzo(a,e)pyrene	192-65-4	2	50 kg total PAHs	VOC, PAH
	Dibenzo(a,h)acridine	226-36-8	2	50 kg total PAHs	VOC, PAH
	Dibenzo(a,h)anthracene	53-70-3	2	50 kg total PAHs	VOC, PAH
	Dibenzo(a,h)pyrene	189-64-0	2	50 kg total PAHs	VOC, PAH
	Dibenzo(a,i)pyrene	189-55-9	2	50 kg total PAHs	VOC, PAH
	Dibenzo(a,l)pyrene	191-30-0	2	50 kg total PAHs	VOC, PAH
7H-	Dibenzo(c,g)carbazole	194-59-2	2	50 kg total PAHs	VOC, PAH
7,12-	Dimethylbenz(a)anthracene	57-97-6	2	50 kg total PAHs	VOC, PAH
	Fluoranthene	206-44-0	2	50 kg total PAHs	VOC, PAH
	Fluorene	86-73-7	2	50 kg total PAHs	VOC, PAH
	Indeno(1,2,3-c,d)pyrene	193-39-5	2	50 kg total PAHs	VOC, PAH
3-	Methylcholanthrene	56-49-5	2	50 kg total PAHs	VOC, PAH
5-	Methylchrysene	3697-24-3	2	50 kg total PAHs	VOC, PAH
1-	Nitropyrene	5522-43-0	2	50 kg total PAHs	VOC, PAH
	Perylene	198-55-0	2	50 kg total PAHs	VOC, PAH
	Phenanthrene	85-01-8	2	50 kg total PAHs	VOC, PAH
	Pyrene	129-00-0	2	50 kg total PAHs	VOC, PAH
	Quinoline	91-22-5	2	50 kg total PAHs	VOC, PAH
1,2,3,4,7,8,9-	Heptachlorodibenzofuran	55673-89-7	3	Activity-based
1,2,3,4,6,7,8-	Heptachlorodibenzofuran	67562-39-4	3	Activity-based
1,2,3,4,6,7,8-	Heptachlorodibenzo-p-dioxin	35822-46-9	3	Activity-based
	Hexachlorobenzene	118-74-1	3	Activity-based
1,2,3,7,8,9-	Hexachlorodibenzofuran	72918-21-9	3	Activity-based
1,2,3,6,7,8-	Hexachlorodibenzofuran	57117-44-9	3	Activity-based
1,2,3,4,7,8-	Hexachlorodibenzofuran	70648-26-9	3	Activity-based
2,3,4,6,7,8-	Hexachlorodibenzofuran	60851-34-5	3	Activity-based
1,2,3,6,7,8-	Hexachlorodibenzo-p-dioxin	57653-85-7	3	Activity-based
1,2,3,4,7,8-	Hexachlorodibenzo-p-dioxin	39227-28-6	3	Activity-based
1,2,3,7,8,9-	Hexachlorodibenzo-p-dioxin	19408-74-3	3	Activity-based
	Octachlorodibenzofuran	39001-02-0	3	Activity-based
	Octachlorodibenzo-p-dioxin	3268-87-9	3	Activity-based
2,3,4,7,8-	Pentachlorodibenzofuran	57117-31-4	3	Activity-based
1,2,3,7,8-	Pentachlorodibenzofuran	57117-41-6	3	Activity-based
1,2,3,7,8-	Pentachlorodibenzo-p-dioxin	40321-76-4	3	Activity-based
2,3,7,8-	Tetrachlorodibenzofuran	51207-31-9	3	Activity-based
2,3,7,8-	Tetrachlorodibenzo-p-dioxin	1746-01-6	3	Activity-based
	Carbon monoxide	630-08-0	4	20 tonnes release
	Nitrogen oxides (expressed as nitrogen dioxide)	11104-93-1	4	20 tonnes release
	PM2.5^17,¹⁸	NA - M10	4	0.3 tonnes release
	PM10^18,^19,	NA - M09	4	0.5 tonnes release
	Sulphur dioxide	7446-09-5	4	20 tonnes release
	Total Particulate Matter ^18, ²⁰	NA - M08	4	20 tonnes release
	Volatile Organic Compounds (VOCs) ²¹	NA - M16	4	10 tonnes release	VOC
	Acetylene	74-86-2	5	1 tonne air release	VOC
	Adipic acid	124-04-9	5	1 tonne air release	VOC
	Aniline (and its salts) ¹	62-53-3	5	1 tonne air release	VOC
	Anthraquinone (all isomers)	NA - 23	5	1 tonne air release	VOC
	Benzene	71-43-2	5	1 tonne air release	VOC
1,3-	Butadiene	106-99-0	5	1 tonne air release	VOC
	Butane (all isomers)	NA - 24	5	1 tonne air release	VOC
	Butene (all isomers)	25167-67-3	5	1 tonne air release	VOC
2-	Butoxyethanol	111-76-2	5	1 tonne air release	VOC
n-	Butyl acetate	123-86-4	5	1 tonne air release	VOC
	Chlorobenzene	108-90-7	5	1 tonne air release	VOC
	Creosote	8001-58-9	5	1 tonne air release	VOC
	Cycloheptane	NA - 25	5	1 tonne air release	VOC
	Cyclohexene	NA - 26	5	1 tonne air release	VOC
	Cyclooctane	NA - 27	5	1 tonne air release	VOC
	Decane (all isomers)	NA - 28	5	1 tonne air release	VOC
p-	Dichlorobenzene	106-46-7	5	1 tonne air release	VOC
1,2-	Dichloroethane	107-06-2	5	1 tonne air release	VOC
	Diethylene glycol butyl ether	112-34-5	5	1 tonne air release	VOC
	Diethylene glycol ethyl ether acetate	112-15-2	5	1 tonne air release	VOC
	Dihydronapthalene (all isomers)	NA - 29	5	1 tonne air release	VOC
	Dimethylether	115-10-6	5	1 tonne air release	VOC
	Dodecane (all isomers)	NA - 30	5	1 tonne air release	VOC
	Ethyl acetate	141-78-6	5	1 tonne air release	VOC
	Ethyl alcohol	64-17-5	5	1 tonne air release	VOC
	Ethylene	74-85-1	5	1 tonne air release	VOC
	Ethylene glycol butyl ether acetate	112-07-2	5	1 tonne air release	VOC
	Ethylene glycol hexyl ether	112-25-4	5	1 tonne air release	VOC
	Formaldehyde	50-00-0	5	1 tonne air release	VOC
	Furfuryl alcohol	98-00-0	5	1 tonne air release	VOC
	Heavy alkylate naphtha	64741-65-7	5	1 tonne air release	VOC
	Heavy aromatic solvent naphtha	64742-94-5	5	1 tonne air release	VOC
	Heptane (all isomers)	NA - 31	5	1 tonne air release	VOC
n-	Hexane	110-54-3	5	1 tonne air release	VOC
	Hexane ²²	NA - 32	5	1 tonne air release	VOC
	Hexene (all isomers)	25264-93-1	5	1 tonne air release	VOC
	Hydrotreated heavy naphtha	64742-48-9	5	1 tonne air release	VOC
	Hydrotreated light distillate	64742-47-8	5	1 tonne air release	VOC
	Isopropyl alcohol	67-63-0	5	1 tonne air release	VOC
	Light aromatic solvent naphtha	64742-95-6	5	1 tonne air release	VOC
D-	Limonene	5989-27-5	5	1 tonne air release	VOC
	Methanol	67-56-1	5	1 tonne air release	VOC
	Methyl ethyl ketone	78-93-3	5	1 tonne air release	VOC
	Methyl isobutyl ketone	108-10-1	5	1 tonne air release	VOC
2-	Methyl-3-hexanone	7379-12-6	5	1 tonne air release	VOC
	Methylindan (all isomers)	27133-93-3	5	1 tonne air release	VOC
	Mineral spirits	64475-85-0	5	1 tonne air release	VOC
	Myrcene	123-35-3	5	1 tonne air release	VOC
	Naphtha	8030-30-6	5	1 tonne air release	VOC
	Nonane (all isomers)	NA - 33	5	1 tonne air release	VOC
	Octane (all isomers)	NA - 34	5	1 tonne air release	VOC
	Pentane (all isomers)	NA - 35	5	1 tonne air release	VOC
	Pentene (all isomers)	NA - 36	5	1 tonne air release	VOC
beta-	Phellandrene	555-10-2	5	1 tonne air release	VOC
	Phenyl isocyanate	103-71-9	5	1 tonne air release	VOC
alpha-	Pinene	80-56-8	5	1 tonne air release	VOC
beta-	Pinene	127-91-3	5	1 tonne air release	VOC
	Propane	74-98-6	5	1 tonne air release	VOC
	Propylene	115-07-1	5	1 tonne air release	VOC
	Propylene glycol butyl ether	5131-66-8	5	1 tonne air release	VOC
	Propylene glycol methyl ether acetate	108-65-6	5	1 tonne air release	VOC
	Solvent naphtha light aliphatic	64742-89-8	5	1 tonne air release	VOC
	Solvent naphtha medium aliphatic	64742-88-7	5	1 tonne air release	VOC
	Stoddard solvent	8052-41-3	5	1 tonne air release	VOC
	Styrene	100-42-5	5	1 tonne air release	VOC
	Terpenes (all isomers)	68956-56-9	5	1 tonne air release	VOC
	Tetrahydrofuran	109-99-9	5	1 tonne air release	VOC
	Toluene	108-88-3	5	1 tonne air release	VOC
1,2,4-	Trimethylbenzene	95-63-6	5	1 tonne air release	VOC
	Trimethylbenzene ²³	25551-13-7	5	1 tonne air release	VOC
	Trimethylfluorosilane	420-56-4	5	1 tonne air release	VOC
	Vinyl acetate	108-05-4	5	1 tonne air release	VOC
	VM & P naphtha	8032-32-4	5	1 tonne air release	VOC
	White mineral oil	8042-47-5	5	1 tonne air release	VOC
	Xylene (all isomers) ¹⁴	1330-20-7	5	1 tonne air release	VOC

Notes:

Disclaimer:

Should any inconsistencies be found between this list and the official Canada Gazette, Part I Notice with respect to substances in the National Pollutant Release Inventory, the Notice will prevail.

**Threshold Category Descriptions:

Part 1A: A report is required for one or more substances if they were manufactured, processed or otherwise used (MPO) at a facility at a concentration ≥ 1% by weight (except for by-products and mine tailings) and in a quantity of 10 tonnes or more, and employees worked 20,000 hours or more at a facility.

Part 1B: A report is required for substances if they were manufactured, processed or otherwise used at a facility in quantities equal to or exceeding quantity and concentration thresholds, and employees worked 20,000 hours or more at a facility. The concentration threshold is not applicable for by-products or tailings/waste rock.

Part 2: A report is required for substances if polycyclic aromatic hydrocarbons (PAHs) were incidentally manufactured or present in mine tailings, and released, disposed or transferred from a facility in a combined quantity of 50 kilograms or more, and employees worked 20,000 hours or more at a facility. Wood preservation facilities using creosote must report regardless of the reporting threshold for PAHs and regardless of the number of hours worked by employees.

Part 3: A report is required for substances if a facility was engaged in specific activities.

Part 4: All facilities are required to consider Criteria Air Contaminants (CACs) released from stationary combustion equipment regardless of the number of employees at the facility. Additionally, facilities with greater than 20,000 employee hours must also consider all other sources of CACs at the facility.

Part 5: A report is required for any of the 75 listed Volatile Organic Compounds (VOCs) (including individual substances, isomer groups and other groups and mixtures) if they were released to air in a quantity of 1 tonne or greater and the 10 tonne air release threshold for VOCs (under Part 4) was met.

Substance Notes:

¹ Total of the acid or base and its salts, expressed as the molecular weight of the acid or base. The CAS RN corresponds to the weak acid or base.

² Total of ammonia (NH3 - CAS RN 7664-41-7) and the ammonium ion (NH4+ - CAS RN 14798-03-9) in solution, expressed as ammonia.

³ Total of the pure element and the equivalent weight of the element contained in any compound, alloy or mixture.

⁴ Total of pure chromium and the equivalent weight of chromium contained in any compound, alloy or mixture. Excludes hexavalent chromium (and its compounds).

⁵ Total of all isomers of cresol: m-cresol (CAS RN 108-39-4), o-cresol (CAS RN 95-48-7) and p-cresol (CAS RN 106-44-5).

⁶ Total of all isomers, including, but not limited to, isomers with CAS RN 354-12-1, 354-15-4 and 354-21-2.

⁷ Total of all isomers, including, but not limited to, isomers with CAS RN 306-83-2, 354-23-4, 812-04-4 and 90454-18-5.

⁸ Total of all isomers, including, but not limited to, isomers with CAS RN 76-14-2, 354-25-6, 374-07-2 and
2837-89-0.

⁹ Nitrate ion in solution at a pH of 6.0 or more.

¹⁰ Total of octylphenol and its ethoxylates, limited to: CAS RN 140-66-9, 1806-26-4, 27193-28-8, 68987-90-6, 9002-93-1, and 9036-19-5.

¹¹ Excludes yellow or white phosphorous (CAS RN 7723-14-0).

¹² Total of hydrogen sulphide (CAS RN 7783-06-4), carbon disulphide (CAS RN 75-15-0), carbonyl sulphide (CAS RN 463-58-1), dimethyl sulphide (CAS RN 75-18-3), dimethyl disulphide (CAS RN 624-92-0), and methyl mercaptan (CAS RN 74-93-1), expressed as hydrogen sulphide.

¹³ Total of pure vanadium and the equivalent weight of vanadium contained in any compound or mixture. Excludes vanadium contained in an alloy.

¹⁴ Total of all isomers of xylene: m-xylene (CAS RN 108-38-3), o-xylene (CAS RN 95-47-6) and p-xylene (CAS RN 106-42-3).

¹⁵ Total of pure lead and the equivalent weight of lead contained in any compound, alloy or mixture. Excludes lead (and its compounds) contained in stainless steel, brass or bronze alloys and lead contained in tetraethyl lead (CAS RN 78-00-2).

¹⁶Total of nonylphenol, its ethoxylates and derivatives, limited to: CAS RN 104-40-5, 25154-52-3, 84852-15-3, 1323-65-5, 26523-78-4, 28987-17-9, 68081-86-7, 68515-89-9, 68515-93-5, 104-35-8, 20427-84-3,
26027-38-3, 27177-05-5, 27177-08-8, 28679-13-2, 27986-36-3, 37251-69-7, 7311-27-5, 9016-45-9,
27176-93-8, 37340-60-6, 51811-79-1, 51938-25-1, 68412-53-3, 9051-57-4, 37205-87-1, 68412-54-4, and 127087-87-0.

¹⁷ Particulate matter with a diameter less than or equal to 2.5 micrometres.

¹⁸ Filterable particulate matter, on a dry basis. Excludes condensable particulate matter.

¹⁹ Particulate matter with a diameter less than or equal to 10 micrometres.

²⁰ Particulate matter with a diameter less than 100 micrometres.

²¹ Volatile organic compounds as set out in section 65 of the List of Toxic Substances in Schedule 1 of the Canadian Environmental Protection Act, 1999.

²² Total of all isomers. Excludes n-hexane (CAS RN 110-54-3).

²³ Total of 1,2,3-trimethylbenzene (CAS RN 526-73-8) and 1,3,5-trimethylbenzene (CAS RN 108-67-8). Excludes 1,2,4-trimethylbenzene (CAS RN 95-63-6).

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