Air quality guidelines for residential environments—where children, older adults, and individuals with compromised health may be exposed to contaminants—are not well established. At best, only limited reference data exist for substances such as carbon monoxide, particulate matter, and a few common urban pollutants.
LCS Laboratory reviewed a wide range of provincial, federal, and international sources to extract recommended—but not legally enforceable—indoor air quality levels appropriate for evaluating residential air conditions. These values are summarized in the table below.
It is not surprising that recommended limits vary significantly between organizations. Each group relies on fragmentary epidemiological evidence and applies different toxicological models and assumptions. Despite these differences, the published guidelines offer an essential reference point for understanding what concentrations of chemicals and airborne particles are generally considered safe for the public.
| Contaminant | CAS # | Exposure Duration | Exposure Limit µg/m3 | Ref |
| Acetaldehyde | 75-07-0 | 1 year | 140 | 3 |
| Acetaldehyde | 75-07-0 | 24 hour | 280 | 4 |
| Acetaldehyde | 75-07-0 | 24 hour | 500 | 6 |
| Acetaldehyde | 75-07-0 | 300 | 7 | |
| Acetaldehyde | 75-07-0 | Chronical | 140 | 2 |
| Acetic acid | 64-19-7 | 24 hour | 2500 | 6 |
| Acetic acid | 64-19-7 | 1200 | 7 | |
| Acetone | 67-64-1 | Chronical | 70000 | 5 |
| Acetone | 67-64-1 | 24 hour | 11880 | 6 |
| Acetone | 67-64-1 | 120000 | 7 | |
| Acetonitrile | 75-05-8 | 24 hour | 70 | 6 |
| Acetophenone | 98-86-2 | 490 | 7 | |
| Acetylene | 74-86-2 | 24 hour | 56000 | 6 |
| Acrolein | 107-02-8 | 1 year | 0.35 | 3 |
| Acrolein | 107-02-8 | Chronical | 0.35 | 5 |
| Acrolein | 107-02-8 | 24 hour | 0.40 | 6 |
| Acrylamide | 79-06-1 | 24 hour | 15 | 6 |
| Acrylates (acrylic acid esters) | 110 | 7 | ||
| Acrylonitrile | 107-13-1 | 1 year | 5 | 3 |
| Acrylonitrile | 107-13-1 | 1 year | 0.12 | 6 |
| Acrylonitrile | 107-13-1 | 24 hour | 0.6 | 6 |
| Adipic acid | 124-04-9 | 24 hour | 1167 | 6 |
| Alcohols n and iso Other C6 – C13 | 800 | 7 | ||
| Aliphatic hydrocarbons C6-C8 Other saturated | 14000 | 7 | ||
| Aliphatic hydrocarbons C9-C16 Other saturated | 6000 | 7 | ||
| Alkyltoluene sulphonamide, N- | 24 hour | 120 | 6 | |
| Allyl glycidyl ether | 106-92-3 | 24 hour | 60 | 6 |
| Aluminum distearate | 300-92-5 | 24 hour | 2180 | 6 |
| Aluminum oxide | 1344-28-1 | 24 hour | 120 | 6 |
| Aluminum stearate | 7047-84-9 | 24 hour | 2180 | 6 |
| Aluminum tristearate | 637-12-7 | 24 hour | 2180 | 6 |
| Ammonia | 7664-41-7 | 1 year | 200 | 3 |
| Ammonia | 7664-41-7 | 24 hour | 100 | 6 |
| Ammonium chloride | 12125-02-9 | 24 hour | 120 | 6 |
| Amyl acetate, iso- | 123-92-2 | 24 hour | 53200 | 6 |
| Amyl acetate, n- | 628-63-7 | 24 hour | 53200 | 6 |
| Amyl acetate, secondary | 626-38-0 | 24 hour | 66500 | 6 |
| Aniline | 62-53-3 | Chronical | 1 | 5 |
| Antimony | 7440-36-0 | 24 hour | 25 | 6 |
| Arsenic & inorganic compounds | 7440-38-2 | 8 hour | 0.015 | 3 |
| Arsenic & inorganic compounds | 7440-38-2 | 24 hour | 0.3 | 6 |
| Arsine | 7784-42-1 | 24 hour | 5 | 6 |
| Asbestos (fibres > 5 µm in length) ff/cc | 0.01 | 1 | ||
| Asbestos (fibres > 5 µm in length) ff/cc | 24 hour | 0.04 | 6 | |
| Barium – total water soluble | 7440-39-3 | 24 hour | 10 | 6 |
| Benzene | 71-43-2 | 8 hour | 3 | 3 |
| Benzene | 71-43-2 | 1 year | 0.45 | 6 |
| Benzene | 71-43-2 | 24 hour | 2.3 | 6 |
| Benzene | 71-43-2 | Chronical | 3 | 2 |
| Benzo(a)pyrene | 50-32-8 | 1 year | 0.00001 | 6 |
| Benzo(a)pyrene | 50-32-8 | 24 hour | 0.00005 | 6 |
| Benzoic acid | 65-85-0 | 24 hour | 700 | 6 |
| Benzothiazole | 95-16-9 | 24 hour | 70 | 6 |
| Benzoyl chloride | 98-88-4 | 24 hour | 125 | 6 |
| Benzyl alcohol | 100-51-6 | 24 hour | 880 | 6 |
| Benzyl alcohol | 100-51-6 | 440 | 7 | |
| Beryllium & compounds | 7440-41-7 | 1 year | 0.007 | 3 |
| Beryllium and beryllium compounds | 7440-41-7 | 24 hour | 0.01 | 6 |
| BHT (2,6-di-tert-butyl-4-methylphenol) | 128-37-0 | 100 | 7 | |
| Borax | 1303-96-4 | 24 hour | 33 | 6 |
| Boric acid | 10043-35-3 | 24 hour | 33 | 6 |
| Boron | 7440-42-8 | 24 hour | 120 | 6 |
| Boron tribromide | 10294-33-4 | 24 hour | 35 | 6 |
| Boron trichloride | 10294-34-5 | 24 hour | 35 | 6 |
| Boron trifluoride | 7637-07-2 | 24 hour | 2 | 6 |
| Bromacil | 314-40-9 | 24 hour | 10 | 6 |
| Bromine | 7726-95-6 | 24 hour | 20 | 6 |
| Bromoform | 75-25-2 | 24 hour | 55 | 6 |
| Bromopropane 1- | 106-94-5 | 1 year | 1.7 | 3 |
| Butadiene, 1,3- | 106-99-0 | 1 year | 2 | 3 |
| Butadiene, 1,3- | 106-99-0 | Chronical | 1.7 | 5 |
| Butadiene, 1,3- | 106-99-0 | 1 year | 2 | 6 |
| Butadiene, 1,3- | 106-99-0 | 24 hour | 10 | 6 |
| Butanal | 123-72-8 | 650 | 7 | |
| Butanediol 1,4- | 110-63-4 | 2000 | 7 | |
| Butanoic acid (butyric acid) | 107-92-6 | 1800 | 7 | |
| Butanol 1- | 71-36-3 | 11000 | 7 | |
| Butanol, n- | 71-36-3 | 24 hour | 920 | 6 |
| Butanol, tertiary | 75-65-0 | 24 hour | 30300 | 6 |
| Butanol, tertiary | 75-65-0 | 620 | 7 | |
| Butanonoxime 2- | 96-29-7 | 15 | 7 | |
| Butenal 2-, (Crotonaldehyde) | 4170-30-3 | 5 | 7 | |
| Butoxy-2-propanol, 1- | 5131-66-8 | 24 hour | 3300 | 6 |
| Butoxyethanol 2- | 111-76-2 | Chronical | 11000 | 5 |
| Butyl acetate n- | 123-86-4 | 8500 | 7 | |
| Butyl acrylate | 141-32-2 | 24 hour | 120 | 6 |
| Butyl benzene phthalate | 85-68-7 | 24 hour | 150 | 6 |
| Butyl benzene sulphonamide, N- | 3622-84-2 | 24 hour | 35 | 6 |
| Butyl glycolate | 7397-62-8 | 900 | 7 | |
| Butyl methacrylate n- | 97-88-1 | 2200 | 7 | |
| Butyl stearate | 123-95-5 | 24 hour | 120 | 6 |
| Butyrolactone | 96-48-0 | 2800 | 7 | |
| Cadmium & compounds | 7440-43-9 | 1 year | 0.02 | 3 |
| Cadmium and cadmium compounds | 7440-43-9 | 1 year | 0.005 | 6 |
| Cadmium and cadmium compounds | 7440-43-9 | 24 hour | 0.025 | 6 |
| Calcium carbide | 75-20-7 | 24 hour | 10 | 6 |
| Calcium cyanide (as total salt) | 592-01-8 | 24 hour | 120 | 6 |
| Calcium hydroxide | 1305-62-0 | 24 hour | 13.5 | 6 |
| Calcium oxide | 1305-78-8 | 24 hour | 10 | 6 |
| Calcium stearate | 1592-23-0 | 24 hour | 35 | 6 |
| Caprolactam | 105-60-2 | 1 year | 2.2 | 3 |
| Caprolactam | 105-60-2 | 300 | 7 | |
| Captan | 133-06-2 | 24 hour | 25 | 6 |
| Carbon black | 1333-86-4 | 24 hour | 10 | 6 |
| Carbon disulfide | 75-15-1 | Chronical | 800 | 2 |
| Carbon disulfide | 75-15-0 | 1 year | 800 | 3 |
| Carbon disulfide | 75-15-0 | 24 hour | 330 | 6 |
| Carbon Monoxide | 630-08-0 | 24 hour | 11500 | 4 |
| Carbon Monoxide | 630-08-0 | 24 hour | 7000 | 8 |
| Carbon Monoxide | 630-08-0 | 8 hour | 10000 | 8 |
| Carbon Monoxide | 630-08-0 | 1 hour | 35000 | 8 |
| Carbon Monoxide | 630-08-0 | 15 minutes | 100000 | 8 |
| Carbon Tetrachloride | 56-23-5 | Chronical | 40 | 2 |
| Carbon Tetrachloride | 56-23-5 | 1 year | 40 | 3 |
| Carbon Tetrachloride | 56-23-5 | Chronical | 1.7 | 5 |
| Carbon Tetrachloride | 56-23-5 | 24 hour | 2.4 | 6 |
| Carene 3- | 498-15-7 | 2500 | 7 | |
| Chloramben | 133-90-4 | 24 hour | 120 | 6 |
| Chlordane | 57-74-9 | 24 hour | 5 | 6 |
| Chlorine | 7782-50-5 | 1 year | 0.2 | 3 |
| Chlorine | 7782-50-5 | 24 hour | 10 | 6 |
| Chlorine dioxide | 10049-04-4 | 1 year | 0.6 | 3 |
| Chlorine dioxide | 10049-04-4 | 24 hour | 2 | 6 |
| Chloro-2-methyl-2H-isothiazol-3-one 5-, (CIT) | 26172-55-4 | 1 | 7 | |
| Chlorobenzene | 108-90-7 | 1 year | 1000 | 3 |
| Chlorobenzene | Chronical | 1000 | 2 | |
| Chlorodifluoromethane (Freon 22) | 75-45-6 | 24 hour | 350000 | 6 |
| Chloroethane | 75-00-3 | 24 hour | 5600 | 6 |
| Chloroform | 67-66-3 | 1 year | 300 | 3 |
| Chloroform | 67-66-3 | Chronical | 300 | 5 |
| Chloroform | 67-66-3 | 1 year | 0.2 | 6 |
| Chloroform | 67-66-3 | 24 hour | 1 | 6 |
| Chloroform | 67-66-3 | Chronical | 300 | 2 |
| Chloropicrin | 76-06-2 | 1 year | 0.4 | 3 |
| Chloropropene 3- | 107-05-1 | Chronical | 1 | 5 |
| Chromic trioxide | 1 year | 0.002 | 3 | |
| Chromium (hexavalent) | 18540-29-9 | 1 year | 0.2 | 3 |
| Chromium compounds (metallic, divalent and trivalent forms) | 7440-47-3 | 24 hour | 0.5 | 6 |
| Citric acid | 77-92-9 | 24 hour | 120 | 6 |
| Coal tar pitch volatiles – soluble fraction | 8007-45-2 | 1 year | 0.2 | 6 |
| Coal tar pitch volatiles – soluble fraction | 8007-45-2 | 24 hour | 1 | 6 |
| Cobalt | 7440-48-4 | 24 hour | 0.1 | 6 |
| Copper | 7440-50-8 | 24 hour | 50 | 6 |
| Cresol mixtures | 1319-77-3 | 1 year | 600 | 3 |
| Cresols | 1319-77-3 | 24 hour | 75 | 6 |
| Cyanogen chloride | 506-77-4 | 24 hour | 12 | 6 |
| Cyclohexane | 110-82-7 | Chronical | 6000 | 5 |
| Cyclohexane | 110-82-7 | 24 hour | 6100 | 6 |
| Cyclohexane | 110-82-7 | 6000 | 7 | |
| Cyclohexanedimethanol 1,4- | 105-08-8 | 8300 | 7 | |
| Cyclohexanol | 108-93-0 | 2000 | 7 | |
| Cyclohexanone | 108-94-1 | 1400 | 7 | |
| Cyclopentanone | 120-92-3 | 1200 | 7 | |
| Cymene (o-, m-, p-) | 527-84-4 | 2200 | 7 | |
| Dalapon sodium salt | 127-20-8 | 24 hour | 50 | 6 |
| Decaborane | 17702-41-9 | 24 hour | 25 | 6 |
| Decahydronaphthalene | 91-17-8 | 200 | 7 | |
| Decamethylcyclopentasiloxane (D5) | 541-02-6 | 20000 | 7 | |
| Decanal | 112-31-2 | 900 | 7 | |
| Decenal 2- | 3913-71-1 | 7 | 7 | |
| Decene, 1- | 872-05-9 | 24 hour | 60000 | 6 |
| Detergent enzyme (Subtilisin) | 1395-21-7 | 24 hour | 0.06 | 6 |
| Di(2-ethylhexyl) phthalate | 117-81-7 | 24 hour | 50 | 6 |
| Diazinon | 333-41-5 | 24 hour | 3 | 6 |
| Diborane | 19287-45-7 | 24 hour | 10 | 6 |
| Dibutyl fumarate | 105-75-9 | 50 | 7 | |
| Dibutyl phthalate (DBP, di-n- butyl phthalate) | 84-74-2 | 24 hour | 50 | 6 |
| Dibutyltin dilaurate | 77-58-7 | 24 hour | 30 | 6 |
| Dicapryl phthalate | 131-15-7 | 24 hour | 120 | 6 |
| Dichloro-1,1,2,2-tetrafluoroethane, 1,2- (Freon 114) | 76-14-2 | 24 hour | 700000 | 6 |
| Dichlorobenzene, 1,4- | 106-46-7 | Chronical | 800 | 2 |
| Dichlorobenzene, 1,4- | 106-46-7 | 1 year | 800 | 3 |
| Dichlorobenzene, 1,4- | 106-46-7 | Chronical | 60 | 5 |
| Dichlorobenzene, 1,4- | 106-46-7 | 24 hour | 95 | 6 |
| Dichlorobenzene, 1,4- | 106-46-7 | 150 | 7 | |
| Dichloroethane, 1,1- | 75-34-3 | 24 hour | 10 | 6 |
| Dichloroethane, 1,1- | 75-34-3 | 24 hour | 165 | 6 |
| Dichloroethylene (1,1) | 75-35-4 | 1 year | 70 | 3 |
| Dichloroethylene (1,1) | 75-35-4 | Chronical | 70 | 2 |
| Dichloroethylene, cis-1,2- | 156-59-2 | 24 hour | 105 | 6 |
| Dichloroethylene, sym-1,2- | 540-59-0 | 24 hour | 105 | 6 |
| Dichloroethylene, trans-1,2- | 156-60-5 | 24 hour | 105 | 6 |
| Dichloromethane | 75-09-2 | Chronical | 600 | 5 |
| Diesel Exhaust | 1 year | 5 | 3 | |
| Diethanolamine | 111-42-2 | 1 year | 3 | 3 |
| Diethoxyethane 1,2- | 629-14-1 | 150 | 7 | |
| Diethyl phthalate | 84-66-2 | 24 hour | 125 | 6 |
| Diethylene glycol | 111-46-6 | 5700 | 7 | |
| Diethylene glycol dimethyl ether (1-methoxy-2-(2-methoxy-ethoxy)-ethane) | 111-96-6 | 28 | 7 | |
| Diethylene glycol monobutyl ether | 112-34-5 | 24 hour | 65 | 6 |
| Diethylene glycol monobutyl ether | 112-34-5 | 350 | 7 | |
| Diethylene glycol monoethyl ether (2-(2-ethoxyethoxy)ethanol) | 111-90-0 | 350 | 7 | |
| Diethylene glycol monoethyl ether acetate | 112-15-2 | 24 hour | 1800 | 6 |
| Diethylene glycol monomethyl ether | 111-77-3 | 24 hour | 1200 | 6 |
| Diethylene glycol monomethyl ether acetate (butyldiglykolacetate, 2-(2-butoxyethoxy) ethyl acetate) | 124-17-4 | 24 hour | 85 | 6 |
| Diethylene glycol monomethyl ether acetate (butyldiglykolacetate, 2-(2-butoxyethoxy) ethyl acetate) | 124-17-4 | 850 | 7 | |
| Diethylene glycol n-hexyl ether (2-(2-hexoxyethoxy)-ethanol) | 112-59-4 | 400 | 7 | |
| Diethylene glycol phenylether | 104-68-7 | 80 | 7 | |
| Difluorodichloromethane (Freon 12) | 75-71-8 | 24 hour | 500000 | 6 |
| Dihexyl phthalate | 84-75-3 | 24 hour | 50 | 6 |
| Diisobutyl glutarate | 71195-64-7 | 35 | 7 | |
| Diisobutyl ketone | 108-83-8 | 24 hour | 3500 | 6 |
| Diisobutyl succinate | 925-06-4 | 35 | 7 | |
| Diisopropylbenzenes | 99-62-7 | 750 | 7 | |
| Dimethoxyethane 1,2- | 110-71-4 | 100 | 7 | |
| Dimethyl acetamide, N,N- | 127-19-5 | 24 hour | 300 | 6 |
| Dimethyl adipate | 627-93-0 | 50 | 7 | |
| Dimethyl ether | 115-10-6 | 24 hour | 2100 | 6 |
| Dimethyl glutarate | 1119-40-0 | 25 | 7 | |
| Dimethyl methylphosphonate | 756-79-6 | 24 hour | 875 | 6 |
| Dimethyl phthalate (<abbr>DMP</abbr>) | 131-11-3 | 24 hour | 125 | 6 |
| Dimethyl succinate | 106-65-0 | 20 | 7 | |
| Dimethyl sulfoxide | 67-68-5 | 24 hour | 2100 | 6 |
| Dimethyl-1,3-diamino propane, N,N- | 109-55-7 | 24 hour | 20 | 6 |
| Dimethylformamide | 68-12-2 | 1 year | 80 | 3 |
| Dimethylformamide | 68-12-2 | 50 | 7 | |
| Dimethylformamide (N,N-) | 68-12-2 | Chronical | 80 | 2 |
| Dimethylpropanoic acid 2,2-, (pivalic acid) | 75-98-9 | 2100 | 7 | |
| Di-n-octyl phthalate | 117-84-0 | 24 hour | 120 | 6 |
| Dioxane (1,4-) | 123-91-1 | 1 hour | 3000 | 3 |
| Dioxane (1,4-) | 123-91-1 | 24 hour | 3500 | 6 |
| Dioxane (1,4-) | 123-91-1 | Chronical | 3000 | 2 |
| Dioxane (1,4-) | 123-91-1 | 400 | 7 | |
| Dioxins, furans and dioxin-like | 24 hour | 0.1 | 6 | |
| Dioxolane-1,3 | 646-06-0 | 24 hour | 10 | 6 |
| Diphenylamine | 122-39-4 | 24 hour | 17.5 | 6 |
| Dipropylene glycol | 110-98-5 | 670 | 7 | |
| Dipropylene glycol dimethyl ether | 63019-84-1 | 1300 | 7 | |
| Dipropylene glycol monomethyl ether | 34590-94-8 | 3100 | 7 | |
| Dipropylene glycol monomethyl ether acetate | 88917-22-0 | 950 | 7 | |
| Dipropylene glycol mono-n(t)-butylether | 29911-28-2 | 250 | 7 | |
| Dipropylene glycol mono-n-propylether | 29911-27-1 | 200 | 7 | |
| Diquat dibromide – respirable | 85-00-7 | 24 hour | 0.032 | 6 |
| Diquat dibromide – total | 85-00-7 | 24 hour | 0.16 | 6 |
| Dodecamethylcyclohexasiloxane (D6) | 540-97-6 | 10000 | 7 | |
| Dodecyl benzene sulphonic acid | 1886-81-3 | 24 hour | 120 | 6 |
| Dodine | 2439-10-3 | 24 hour | 10 | 6 |
| Droperidol | 548-73-2 | 24 hour | 1 | 6 |
| Epichlorohydrin | 106-89-8 | 1 year | 3 | 3 |
| Epichlorohydrin | 106-89-8 | Chronical | 1 | 5 |
| Epichlorohydrin | Chronical | 3 | 2 | |
| Epoxybutane (1,2-) | 106-88-7 | 1 year | 20 | 3 |
| Ethoxyethanol 2- | 110-80-5 | Chronical | 70 | 5 |
| Ethyl acrylate | 140-88-5 | 200 | 7 | |
| Ethyl benzene | 100-41-4 | 24 hour | 1000 | 6 |
| Ethyl chloride | 75-00-3 | 1 year | 30000 | 3 |
| Ethyl ether | 60-29-7 | 24 hour | 8000 | 6 |
| Ethyl-2-pyrrolidone; N- | 2687-91-4 | 400 | 7 | |
| Ethylanthraquinone, 2- | 84-51-5 | 24 hour | 10 | 6 |
| Ethylbenzene | 100-41-4 | 1 year | 2000 | 3 |
| Ethylbenzene | 100-41-4 | Chronical | 2000 | 5 |
| Ethylbenzene | 100-41-4 | 850 | 7 | |
| Ethylbenzene | 100-41-4 | Chronical | 2000 | 2 |
| Ethylene | 74-85-1 | 24 hour | 40 | 6 |
| Ethylene carbonate | 96-49-1 | 4800 | 7 | |
| Ethylene dibromide | 106-93-4 | 1 year | 0.8 | 3 |
| Ethylene dibromide | 106-93-4 | 24 hour | 3 | 6 |
| Ethylene dichloride | 107-06-2 | 1 year | 400 | 3 |
| Ethylene dichloride | 107-06-2 | 1 year | 0.4 | 6 |
| Ethylene dichloride | 107-06-2 | 24 hour | 2 | 6 |
| Ethylene glycol | 107-21-1 | 1 year | 400 | 3 |
| Ethylene glycol | 107-21-1 | 24 hour | 12700 | 6 |
| Ethylene glycol | 107-21-1 | 3400 | 7 | |
| Ethylene glycol | Chronical | 400 | 2 | |
| Ethylene glycol butyl ether (Butyl cellosolve) | 111-76-2 | 24 hour | 2400 | 6 |
| Ethylene glycol butyl ether acetate (Butyl cellosolve acetate) | 112-07-2 | 24 hour | 3250 | 6 |
| Ethylene glycol butyl ether acetate (Butyl cellosolve acetate) | 112-07-2 | 2200 | 7 | |
| Ethylene glycol dinitrate | 628-96-6 | 24 hour | 3 | 6 |
| Ethylene glycol ethyl ether acetate (Cellosolve acetate ) | 111-15-9 | 1 year | 300 | 3 |
| Ethylene glycol ethyl ether acetate (Cellosolve acetate ) | 111-15-9 | 24 hour | 540 | 6 |
| Ethylene glycol ethyl ether acetate (Cellosolve acetate ) | 111-15-9 | 50 | 7 | |
| Ethylene glycol isopropylether (2-methylethoxyethanol) | 109-59-1 | 220 | 7 | |
| Ethylene glycol monobutyl ether | 111-76-2 | 1 year | 82 | 3 |
| Ethylene glycol monobutylether (2-butoxyethanol) | 111-76-2 | 1600 | 7 | |
| Ethylene glycol monoethyl ether | Chronical | 70 | 2 | |
| Ethylene glycol monoethyl ether (2-ethoxyethanol) | 110-80-5 | 24 hour | 380 | 6 |
| Ethylene glycol monoethyl ether (2-ethoxyethanol) | 110-80-5 | 30 | 7 | |
| Ethylene glycol monoethyl ether acetate | Chronical | 300 | 2 | |
| Ethylene glycol monohexyl ether | 112-25-4 | 24 hour | 2500 | 6 |
| Ethylene glycol monoisopropyl ether (2-propoxyethanol) | 2807-30-9 | 860 | 7 | |
| Ethylene glycol monomethyl ether | 109-86-4 | 1 year | 60 | 3 |
| Ethylene glycol monomethyl ether | Chronical | 60 | 2 | |
| Ethylene glycol monomethyl ether (2-methoxyethanol) | 109-86-4 | 100 | 7 | |
| Ethylene glycol monomethyl ether acetate | 110-49-6 | 1 year | 90 | 3 |
| Ethylene glycol monomethyl ether acetate | Chronical | 90 | 2 | |
| Ethylene glycol n-hexyl ether (2-hexoxyethanol) | 112-25-4 | 900 | 7 | |
| Ethylene oxide | 75-21-8 | 1 year | 30 | 3 |
| Ethylene oxide | 75-21-8 | Chronical | 0.002 | 5 |
| Ethylene oxide | 75-21-8 | 1 year | 0.04 | 6 |
| Ethylene oxide | 75-21-8 | 24 hour | 0.2 | 6 |
| Ethylenediaminetetra acetic acid | 60-00-4 | 24 hour | 120 | 6 |
| Ethylhexan-1-ol 2- | 104-76-7 | 300 | 7 | |
| Ethyl-hexanal 2- | 123-05-7 | 900 | 7 | |
| Ethylhexanoic acid 2- | 149-57-5 | 150 | 7 | |
| Ethylhexyl acetate 2- | 103-09-3 | 350 | 7 | |
| Ethylhexyl acrylate 2- | 103-11-7 | 380 | 7 | |
| Ethylhexyl methacrylate 2- | 688-84-6 | 2100 | 7 | |
| Ethyltoluene 2- | 611-14-3 | 550 | 7 | |
| Fentanyl citrate | 990-73-8 | 24 hour | 0.02 | 6 |
| Ferric oxide | 1309-37-1 | 24 hour | 25 | 6 |
| Fluorides | 7664-39-3 | 24 hour | 3 | 6 |
| Fluorides (excl. HF) | 1 year | 13 | 3 | |
| Fluorinert 3M-FC-70 | 24 hour | 120 | 6 | |
| Formaldehyde | 50-00-0 | 8 hour | 9 | 3 |
| Formaldehyde | 50-00-0 | 24 hour | 50 | 4 |
| Formaldehyde | 50-00-0 | 24 hour | 65 | 6 |
| Formaldehyde | 50-00-0 | 100 | 7 | |
| Formaldehyde | 50-00-0 | 30 minutes | 100 | 8 |
| Formic acid | 64-18-6 | 24 hour | 500 | 6 |
| Furfural | 98-01-1 | 10 | 7 | |
| Furfuryl alcohol | 98-00-0 | 24 hour | 1000 | 6 |
| Glutaraldehyde | 111-30-8 | 1 year | 0.08 | 3 |
| Glutaraldehyde | 111-30-8 | 24 hour | 14 | 6 |
| Glutaraldehyde | 111-30-8 | 1 | 7 | |
| Haloperidol | 52-86-8 | 24 hour | 0.1 | 6 |
| HDI Biuret | 4035-89-6 | 24 hour | 3 | 6 |
| HDI Isocyanurate (<abbr>HDI-IC</abbr>) | 3779-63-3 | 24 hour | 3 | 6 |
| Heptanal | 111-71-7 | 900 | 7 | |
| Heptane, n- | 142-82-5 | 24 hour | 11000 | 6 |
| Heptane, n- | 142-82-5 | 15000 | 7 | |
| Heptenal 2- | 2463-63-0 | 7 | 7 | |
| Hexachlorocyclopentadiene | 77-47-4 | 24 hour | 2 | 6 |
| Hexamethyl disilazane | 999-97-3 | 24 hour | 2 | 6 |
| Hexamethylene diacrylate | 13048-33-4 | 10 | 7 | |
| Hexamethylene diisocyanate (<abbr>HDI</abbr>) monomer | 822-06-0 | 24 hour | 0.03 | 6 |
| Hexamethylene diisocyanate (monomer) | 822-06-0 | 1 year | 0.03 | 3 |
| Hexamethylene diisocyanate (polyisocyan.) | 3779-63-3 | 1 year | 0.4 | 3 |
| Hexamethylenediamine | 124-09-4 | 24 hour | 16 | 6 |
| Hexamethyleneimine | 111-49-9 | 24 hour | 315 | 6 |
| Hexamethylenetetramine | 100-97-0 | 30 | 7 | |
| Hexanal | 66-25-1 | 900 | 7 | |
| Hexane (n-) | 110-54-3 | 1 year | 7000 | 3 |
| Hexane (n-) | 110-54-3 | 4300 | 7 | |
| Hexane (n-) | Chronical | 7000 | 2 | |
| Hexane, n- (n-Hexane and hexane isomers only) | 110-54-3 | 24 hour | 7500 | 6 |
| Hexane, n- (part of a mixture) | 110-54-3 | 24 hour | 2500 | 6 |
| Hexanol 1- | 2100 | 7 | ||
| Hexenal 2- | 6728-26-3 | 7 | 7 | |
| Hexylene glycol (2-methyl-2,4-pentanediol) | 107-41-5 | 3500 | 7 | |
| Hydrazine | 302-01-2 | 1 year | 0.2 | 3 |
| Hydrogen chloride | 7647-01-0 | 1 year | 9 | 3 |
| Hydrogen chloride | 7647-01-0 | 24 hour | 20 | 6 |
| Hydrogen cyanide | 74-90-8 | 1 year | 9 | 3 |
| Hydrogen cyanide | 74-90-8 | 24 hour | 8 | 6 |
| Hydrogen fluoride | 7664-39-3 | 1 year | 14 | 3 |
| Hydrogen peroxide | 7722-84-1 | 24 hour | 30 | 6 |
| Hydrogen sulfide | 7783-06-4 | 1 year | 10 | 3 |
| Hydrogen sulphide | 7783-06-5 | 24 hour | 7 | 6 |
| Hydroxy-4-methyl-pentane-2-on (diacetone alcohol) 4- | 123-42-2 | 960 | 7 | |
| Hydroxyacetone 1-, (1-hydroxy-2-propanone) | 116-09-6 | 2100 | 7 | |
| Indene | 95-13-6 | 450 | 7 | |
| Iron (metallic) | 7439-89-6 | 24 hour | 4 | 6 |
| Isobutanoic acid (isobutyric acid) | 79-31-2 | 1800 | 7 | |
| Isobutanol | 78-83-1 | 24 hour | 4600 | 6 |
| Isobutanol | 78-83-1 | 11000 | 7 | |
| Isobutyl acetate | 110-19-0 | 4800 | 7 | |
| Isophorone | 78-59-1 | 1 year | 2000 | 3 |
| Isophorone | Chronical | 2000 | 2 | |
| Isopropanol | 67-63-0 | 1 year | 7000 | 3 |
| Isopropanol | Chronical | 7000 | 2 | |
| Isopropanol (Isopropyl alcohol) | 67-63-0 | 24 hour | 7300 | 6 |
| Isopropyl Alcohol | 67-63-0 | Chronical | 7000 | 5 |
| Isopropyl benzene | 98-82-8 | 24 hour | 400 | 6 |
| Isopropyl ether | 108-20-3 | 24 hour | 110000 | 6 |
| Isopropylbenzene (Cumene) | 98-82-8 | Chronical | 400 | 5 |
| Isopropylbenzene (cumene) | 98-82-8 | 1700 | 7 | |
| Lead and lead compounds | 7439-92-1 | 1 month | 0.2 | 6 |
| Lead and lead compounds | 7439-92-1 | 24 hour | 0.5 | 6 |
| Limonene | 138-86-3 | 5000 | 7 | |
| Lindane (Hexachlorocyclohexane) | 57-74-9 | 24 hour | 5 | 6 |
| Lithium (other than hydrides) | 7439-93-2 | 24 hour | 20 | 6 |
| Lithium hydrides | 7580-67-8 | 24 hour | 2.5 | 6 |
| Magnesium oxide | 1309-48-4 | 24 hour | 120 | 6 |
| Magnesium stearate | 557-04-0 | 24 hour | 35 | 6 |
| Malathion | 121-75-5 | 24 hour | 120 | 6 |
| Maleic acid dibutylester | 105-76-0 | 50 | 7 | |
| Maleic anhydride | 108-31-6 | 1 year | 0.7 | 3 |
| Maleic anhydride | 108-31-6 | 24 hour | 30 | 6 |
| Manganese & compounds | 7439-96-5 | 1 year | 0.09 | 3 |
| Mercaptobenzothiazole disulphide | 120-78-5 | 24 hour | 120 | 6 |
| Mercury & inorganic compounds | 7439-97-6 | 1 year | 0.03 | 3 |
| Mercury (<abbr>Hg</abbr>) | 7439-97-6 | 24 hour | 2 | 6 |
| Mercury (as <abbr>Hg</abbr>) – alkyl compounds | 7439-97-6 | 24 hour | 0.5 | 6 |
| Metaldehyde (Acetaldehyde tetramer) | 108-62-3 | 24 hour | 120 | 6 |
| Methacrylic acid | 79-41-4 | 24 hour | 2000 | 6 |
| Methane diphenyl diisocyanate (<abbr>MDI</abbr> monomer) | 101-68-8 | 24 hour | 0.7 | 6 |
| Methanol | 67-56-1 | 1 year | 4000 | 3 |
| Methanol (Methyl alcohol) | 67-56-1 | 24 hour | 4000 | 6 |
| Methoxy-1-butanol 3- | 2517-43-3 | 1700 | 7 | |
| Methoxy-1-methylethyl acetate 2- | 108-65-6 | 650 | 7 | |
| Methoxy-1-propyl acetate, 2- | 70657-70-4 | 24 hour | 1530 | 6 |
| Methoxychlor | 72-43-5 | 24 hour | 120 | 6 |
| Methoxyethyl acetate 2- | 110-49-6 | 150 | 7 | |
| Methyl acrylate | 96-33-3 | 180 | 7 | |
| Methyl bromide | 74-83-9 | 1 year | 5 | 3 |
| Methyl bromide | 74-83-9 | 24 hour | 1350 | 6 |
| Methyl chloride | 74-87-3 | 24 hour | 320 | 6 |
| Methyl chloroform | 71-55-6 | 1 year | 1000 | 3 |
| Methyl chloroform | Chronical | 1000 | 2 | |
| Methyl chloroform (1,1,1- Trichloroethane) | 71-55-6 | 24 hour | 115000 | 6 |
| Methyl cyclohexane | 108-87-2 | 8100 | 7 | |
| Methyl ethyl ketone (2- Butanone) | 78-93-3 | Chronical | 5000 | 5 |
| Methyl ethyl ketone (2- Butanone) | 78-93-3 | 24 hour | 1000 | 6 |
| Methyl ethyl ketone (2- Butanone) | 78-93-3 | 20000 | 7 | |
| Methyl ethyl ketone peroxide | 1338-23-4 | 24 hour | 80 | 6 |
| Methyl formate | 3000 | 7 | ||
| Methyl Isobutyl Ketone | 108-10-1 | Chronical | 3000 | 5 |
| Methyl isobutyl ketone | 108-10-1 | 24 hour | 1200 | 6 |
| Methyl isocyanate | 624-83-9 | 1 year | 1 | 3 |
| Methyl isocyanate | 624-83-9 | 24 hour | 1 | 6 |
| Methyl methacrylate | 80-62-6 | 24 hour | 860 | 6 |
| Methyl methacrylate | 80-62-6 | 750 | 7 | |
| Methyl salicylate | 119-36-8 | 24 hour | 100 | 6 |
| Methyl t-butyl ether | 1634-04-4 | 1 year | 8000 | 3 |
| Methyl t-butyl ether | Chronical | 8000 | 2 | |
| Methyl tert-butyl ether | 1634-04-4 | 24 hour | 7000 | 6 |
| Methyl-2-butanone 3- | 563-80-4 | 7000 | 7 | |
| Methyl-2-pentanone 4-, (methylisobutylketone) | 108-10-1 | 1000 | 7 | |
| Methyl-4-isothiazolin-3-one 2-, (MIT) | 2682-20-4 | 100 | 7 | |
| Methylal | 109-87-5 | 24 hour | 6200 | 6 |
| Methylcyclohexanone 2- | 583-60-8 | 2300 | 7 | |
| Methylcyclopentadienyl manganese tricarbonyl (<abbr>MMT</abbr>) | 12108-13-3 | 24 hour | 10 | 6 |
| Methylcyclopentanone 2- | 1120-72-5 | 1400 | 7 | |
| Methylene chloride | 75-09-2 | 1 year | 400 | 3 |
| Methylene chloride | 75-09-2 | 1 year | 44 | 6 |
| Methylene chloride | 75-09-2 | 24 hour | 220 | 6 |
| Methylene chloride | Chronical | 400 | 2 | |
| Methylene dianiline 4,4′- | 101-77-9 | 1 year | 20 | 3 |
| Methylene dianiline 4,4′- | 101-77-9 | 24 hour | 10 | 6 |
| Methylene diphenyl isocyanate | 101-68-8 | 1 year | 0.08 | 3 |
| Methylene iodide | 75-11-6 | 24 hour | 65 | 6 |
| Methylene-bis-2-chloroaniline, 4,4- | 24 hour | 10 | 6 | |
| Methyl-n-amyl ketone | 110-43-0 | 24 hour | 4600 | 6 |
| Miconazole nitrate | 22832-87-7 | 24 hour | 5 | 6 |
| Mineral spirits | 24 hour | 2600 | 6 | |
| Molybdenum | 7439-98-7 | 24 hour | 120 | 6 |
| Monomethyl amine | 74-89-5 | 24 hour | 25 | 6 |
| Naphthalene | 91-20-3 | 1 year | 9 | 3 |
| Naphthalene | 24 hour | 10 | 4 | |
| Naphthalene | 91-20-3 | 24 hour | 22.5 | 6 |
| Naphthalene | 91-20-3 | 10 | 7 | |
| Naphthalene | 1 year | 10 | 8 | |
| Naphthalene | Chronical | 9 | 2 | |
| Naphthol, alpha- | 90-15-3 | 24 hour | 100 | 6 |
| n-Butyl acrylate | 141-32-2 | 110 | 7 | |
| n-Butyl formate | 592-84-7 | 4900 | 7 | |
| n-Butylbenzene | 104-51-8 | 1100 | 7 | |
| Neopentyl glycol | 126-30-7 | 8700 | 7 | |
| n-Heptanoic acid | 111-14-8 | 2100 | 7 | |
| n-Hexanoic acid (caproic acid) | 142-62-1 | 2100 | 7 | |
| Nickel & compounds | 7440-02-0 | 1 year | 0.014 | 3 |
| Nickel carbonyl | 13463-39-3 | 24 hour | 0.5 | 6 |
| Nickel oxide | 1313-99-1 | 1 year | 0.02 | 3 |
| Nitric acid | 7697-37-2 | 24 hour | 35 | 6 |
| Nitrilotriacetic acid | 139-13-9 | 24 hour | 120 | 6 |
| Nitrogen Dioxide | 10102-44-0 | 24 hour | 20 | 4 |
| Nitrogen Dioxide | 10102-44-0 | 24 hour | 200 | 6 |
| Nitrogen Dioxide | 1 year | 40 | 8 | |
| Nitrogen Dioxide | 1 hour | 200 | 8 | |
| Nitroglycerin | 55-63-0 | 24 hour | 3 | 6 |
| Nitrous oxide | 10024-97-2 | 24 hour | 9000 | 6 |
| N-methyl-2-pyrrolidon | 872-50-4 | 1800 | 7 | |
| Nonanal | 124-19-6 | 900 | 7 | |
| Nonenal 2- | 2463-53-8 | 7 | 7 | |
| n-Propylbenzene | 103-65-1 | 950 | 7 | |
| Octamethylcyclotetrasiloxane (D4) | 556-67-2 | 116000 | 7 | |
| Octanal | 124-13-0 | 900 | 7 | |
| Octanoic acid n- | 124-07-2 | 2100 | 7 | |
| Octanol 1- | 111-87-5 | 1700 | 7 | |
| Octenal 2- | 2363-89-5 | 7 | 7 | |
| Octene, 1- | 111-66-0 | 24 hour | 50000 | 6 |
| Oxalic acid | 144-62-7 | 24 hour | 25 | 6 |
| Oxo-heptyl acetate | 90438-79-2 | 24 hour | 85 | 6 |
| Oxo-hexyl acetate | 88230-35-7 | 24 hour | 85 | 6 |
| Ozone (O₃) | 24 hour | 40 | 4 | |
| Palladium – water soluble compounds | 7647-10-1 | 24 hour | 10 | 6 |
| Paraquat dichloride – respirable | 1910-42-5 | 24 hour | 0.003 | 6 |
| Paraquat dichloride – total | 1910-42-5 | 24 hour | 0.015 | 6 |
| Particulate matter – PM10 | 24 hour | 50 | 6 | |
| Particulate matter – PM10 | 24 hour | 30 | 8 | |
| Particulate matter – PM2.5 | Chronical | 15 | 2 | |
| Particulate matter – PM2.5 | 24 hour | 27 | 6 | |
| Particulate matter – PM2.5 | 24 hour | 25 | 8 | |
| Particulates Total | 1 year | 60 | 6 | |
| Particulates Total | 24 hour | 120 | 6 | |
| Penicillin | 1406-05-9 | 24 hour | 0.1 | 6 |
| Pentaborane | 19624-22-7 | 24 hour | 1 | 6 |
| Pentachlorophenol | 87-86-5 | 24 hour | 20 | 6 |
| Pentanal | 110-62-3 | 800 | 7 | |
| Pentanoic acid n-, (valeric acid) | 109-52-4 | 2100 | 7 | |
| Pentanol 1- | 71-41-0 | 730 | 7 | |
| Pentenal 2- | 1576-87-0 | 7 | 7 | |
| Perchloroethylene | 127-18-4 | 1 year | 35 | 3 |
| Perchloroethylene | 127-18-4 | 24 hour | 360 | 6 |
| Phenol | 108-95-2 | 1 year | 200 | 3 |
| Phenol | 108-95-2 | 24 hour | 30 | 6 |
| Phenol | 108-95-2 | 70 | 7 | |
| Phenol | Chronical | 200 | 2 | |
| Phenoxyethanol 2- | 122-99-6 | 60 | 7 | |
| Phenyl octane and isomers | 2189-60-8 | 1100 | 7 | |
| Phenylpropene 2-, (α-methylstyrene) | 98-83-9 | 1200 | 7 | |
| Phosgene | 75-44-5 | 24 hour | 45 | 6 |
| Phosphine | 7803-51-2 | 1 year | 0.8 | 3 |
| Phosphine | 7803-51-2 | 24 hour | 10 | 6 |
| Phosphoric acid | 7664-38-2 | 1 year | 7 | 3 |
| Phosphoric acid | 7664-38-2 | 24 hour | 7 | 6 |
| Phosphorous oxychloride | 10025-87-3 | 24 hour | 12 | 6 |
| Phosphorous pentachloride | 10026-13-8 | 24 hour | 10 | 6 |
| Phthalic anhydride | 85-44-9 | 1 year | 20 | 3 |
| Phthalic anhydride | 85-44-9 | 24 hour | 120 | 6 |
| Pimozide | 2062-78-4 | 24 hour | 1 | 6 |
| Pinene ß- | 127-91-3 | 1400 | 7 | |
| Pinene α- | 80-56-8 | 2500 | 7 | |
| Platinum – water soluble compounds | 7440-06-4 | 24 hour | 0.2 | 6 |
| Polybutene-1-sulfone | 24 hour | 120 | 6 | |
| Polychlorinated biphenyls | 1336-36-3 | 1 year | 0.035 | 6 |
| Polychlorinated biphenyls | 1336-36-3 | 24 hour | 0.15 | 6 |
| Polychloroprene | 9010-98-4 | 24 hour | 500 | 6 |
| Polycyclic Aromatic Hydrocarbons | 1 year | 0.001 | 8 | |
| Polymeric methane diphenyl diisocyanate | 9016-87-9 | 24 hour | 0.7 | 6 |
| Potassium cyanide | 151-50-8 | 24 hour | 120 | 6 |
| Potassium hydroxide | 1310-58-3 | 24 hour | 14 | 6 |
| Potassium nitrate | 7757-79-1 | 24 hour | 120 | 6 |
| Propanal | 123-38-6 | 650 | 7 | |
| Propanol, n- (Propyl alcohol) | 71-23-8 | 24 hour | 16000 | 6 |
| Propenyl benzene 1- | 637-50-3 | 1200 | 7 | |
| Propionaldehyde | 123-38-6 | Chronical | 8 | 5 |
| Propionic acid | 79-09-4 | 1500 | 7 | |
| Propyl acetate (n-, iso-) | 108-21-4 | 4200 | 7 | |
| Propyl acetate, n- | 109-60-4 | 24 hour | 6600 | 6 |
| Propylene | 115-07-1 | 1 year | 3000 | 3 |
| Propylene | 115-07-1 | 24 hour | 4000 | 6 |
| Propylene carbonate | 108-32-7 | 1800 | 7 | |
| Propylene dichloride | 78-87-5 | 24 hour | 2400 | 6 |
| Propylene glycol (1,2-dihydroxypropane) | 57-55-6 | 24 hour | 120 | 6 |
| Propylene glycol (1,2-dihydroxypropane) | 57-55-6 | 2100 | 7 | |
| Propylene glycol 1,2-, n-propylether | 1569-01-3 | 5200 | 7 | |
| Propylene glycol 2-methyl ether 1-, 2-methoxy-1-propanol | 1589-47-5 | 19 | 7 | |
| Propylene glycol 2-methyl ether acetate 1- , (2-methoxy-1-propyl acetate) | 70657-70-4 | 28 | 7 | |
| Propylene glycol diacetate | 623-84-7 | 1600 | 7 | |
| Propylene glycol dimethyl ether 1,2- | 7778-85-0 | 500 | 7 | |
| Propylene glycol monomethyl ether | 107-98-2 | 1 year | 7000 | 3 |
| Propylene glycol monomethyl ether | Chronical | 7000 | 2 | |
| Propylene glycol monomethyl ether (1-methoxy-2-propanol) | 107-98-2 | 7900 | 7 | |
| Propylene glycol monomethyl ether acetate | 108-65-6 | 24 hour | 5000 | 6 |
| Propylene glycol n-butyl ether 1,2- | 5131-66-8 | 650 | 7 | |
| Propylene Oxide | 75-56-9 | 1 year | 30 | 3 |
| Propylene Oxide | 75-56-9 | Chronical | 2.7 | 5 |
| Propylene Oxide | 75-56-9 | 1 year | 0.3 | 6 |
| Propylene Oxide | 75-56-9 | 24 hour | 1.5 | 6 |
| Pyridine | 110-86-1 | 24 hour | 150 | 6 |
| Quinone | 106-51-4 | 24 hour | 15 | 6 |
| Selenium | 7782-49-2 | 24 hour | 10 | 6 |
| Selenium & compounds (excl. H₂Se) | 1 year | 20 | 3 | |
| Silane | 7803-62-5 | 24 hour | 150 | 6 |
| Silica (crystalline, respirable) | 1 year | 3 | 3 | |
| Silica (crystalline, respirable) | 14464-46-1 | 24 hour | 5 | 6 |
| Silver | 7440-22-4 | 24 hour | 1 | 6 |
| Sodium bisulphite | 7631-90-5 | 24 hour | 120 | 6 |
| Sodium chlorate | 7775-09-9 | 24 hour | 6 | 6 |
| Sodium chlorite | 7758-19-2 | 24 hour | 20 | 6 |
| Sodium cyanide | 143-33-9 | 24 hour | 120 | 6 |
| Sodium hydroxide | 1310-73-2 | 24 hour | 10 | 6 |
| Sodium nitrate | 7631-99-4 | 24 hour | 7000 | 6 |
| Stannous chloride | 7772-99-8 | 24 hour | 10 | 6 |
| Strontium | 7440-24-6 | 24 hour | 120 | 6 |
| Strontium carbonate | 1633-05-2 | 24 hour | 120 | 6 |
| Strontium hydroxide | 18480-07-4 | 24 hour | 120 | 6 |
| Strontium oxide | 1314-11-0 | 24 hour | 120 | 6 |
| Styrene | 100-42-5 | 1 year | 900 | 3 |
| Styrene | 100-42-5 | Chronical | 850 | 5 |
| Styrene | 100-42-5 | 24 hour | 400 | 6 |
| Styrene | 100-42-5 | 250 | 7 | |
| Styrene | Chronical | 900 | 2 | |
| Sulfamic acid | 5329-14-6 | 24 hour | 120 | 6 |
| Sulphur dioxide | 10025-87-3 | 24 hour | 12 | 6 |
| Sulphur hexafluoride | 2551-62-4 | 24 hour | 600000 | 6 |
| Sulphuric acid | 7664-93-9 | 1 year | 1 | 3 |
| Sulphuric acid | 7664-93-9 | 24 hour | 5 | 6 |
| Talc – fibrous | 14807-96-6 | 24 hour | 2 | 6 |
| Tellurium (except hydrogen telluride) | 13494-80-9 | 24 hour | 10 | 6 |
| Terpene hydrocarbons Other | 1400 | 7 | ||
| Tetrabutylurea | 4559-86-8 | 24 hour | 10 | 6 |
| Tetrachloroethene | 127-18-4 | 80 | 7 | |
| Tetrachloroethylene | 127-18-4 | Chronical | 40 | 5 |
| Tetrachloroethylene | 1 week | 250 | 8 | |
| Tetrachloroethylene(Perchloroethylene) | Chronical | 35 | 2 | |
| Tetradecamethylcycloheptasiloxane (D7) | 107-50-6 | 10000 | 7 | |
| Tetrahydrofuran | 109-99-9 | 24 hour | 93000 | 6 |
| Tetrahydrofuran | 109-99-9 | 500 | 7 | |
| Tetramethyl thiuram disulphide | 137-26-8 | 24 hour | 10 | 6 |
| Tetramethylbenzene 1,2,4,5- | 95-93-2 | 250 | 7 | |
| Thiourea | 62-56-6 | 24 hour | 20 | 6 |
| Tin | 7440-31-5 | 24 hour | 10 | 6 |
| Titanium | 7440-32-6 | 24 hour | 120 | 6 |
| Titanium dioxide | 13463-67-7 | 24 hour | 34 | 6 |
| Tolmetin sodium | 35711-34-3 | 24 hour | 5 | 6 |
| Toluene | 108-88-3 | 1 year | 420 | 3 |
| Toluene | 108-88-3 | 24 hour | 2300 | 4 |
| Toluene | 108-88-3 | 8 hour | 15000 | 4 |
| Toluene | 108-88-3 | 24 hour | 2000 | 6 |
| Toluene | 108-88-3 | 2900 | 7 | |
| Toluene | 108-88-3 | Chronical | 300 | 2 |
| Toluene di-isocyanate, 2,4- and 2,6- (mixed isomers) | 26471-62-5 | 1 year | 0.008 | 3 |
| Toluene di-isocyanate, 2,4- and 2,6- (mixed isomers) | 26471-62-5 | Chronical | 0.008 | 5 |
| Toluene di-isocyanate, 2,4- and 2,6- (mixed isomers) | 584-84-9 | 24 hour | 0.2 | 6 |
| Total reduced sulphur compounds for other facilities | 24 hour | 7 | 6 | |
| Total reduced sulphur from Pulp, Paper and Paperboard Mills | 24 hour | 14 | 6 | |
| Tributyl phosphate | 126-73-8 | 300 | 7 | |
| Tributyltin oxide | 56-35-9 | 24 hour | 0.14 | 6 |
| Trichlorobenzene, 1,2,4- | 120-82-1 | 24 hour | 400 | 6 |
| Trichloroethylene | 79-01-6 | 1 year | 600 | 3 |
| Trichloroethylene | 79-01-6 | 1 year | 2.3 | 6 |
| Trichloroethylene | 79-01-6 | 24 hour | 12 | 6 |
| Trichloroethylene | 1 week | 200 | 8 | |
| Trichloroethylene | Chronical | 600 | 2 | |
| Trichlorofluoromethane | 75-69-4 | 24 hour | 6000 | 6 |
| Triethyl phosphate | 78-40-0 | 1700 | 7 | |
| Triethylamine | 121-44-8 | 1 year | 200 | 3 |
| Triethylamine | 121-44-8 | 60 | 7 | |
| Triethylene glycol-dimethyl ether | 112-49-2 | 150 | 7 | |
| Trifluoroacetic acid | 76-05-1 | 24 hour | 15 | 6 |
| Trifluorotrichloroethane | 76-13-1 | 24 hour | 800000 | 6 |
| Trimethyl-1,3-pentanediol monoisobutyrate 2,2,4- | 25265-77-4 | 850 | 7 | |
| Trimethylbenzene | 526-73-8 | 24 hour | 220 | 6 |
| Trimethylbenzene (1,2,3-,1,2,4-,1,3,5-) | 108-67-8 | 450 | 7 | |
| Trimethylol propane | 77-99-6 | 24 hour | 1250 | 6 |
| Trimethylpentanediol diisobutyrate 2,2,4- | 6846-50-0 | 1300 | 7 | |
| Tripropylene glycol mono-methylether | 20324-33-8 | 1200 | 7 | |
| Tripropyltin methacrylate | 24 hour | 1 | 6 | |
| Undecenal 2- | 2463-77-6 | 7 | 7 | |
| Uranium and uranium compounds | 7440-61-1 | 1 year | 0.03 | 6 |
| Uranium and uranium compounds | 7440-61-1 | 24 hour | 0.15 | 6 |
| Vanadium | 7440-62-2 | 24 hour | 2 | 6 |
| Vinyl acetate | 108-05-4 | 1 year | 200 | 3 |
| Vinyl acetate | Chronical | 200 | 2 | |
| Vinyl chloride | 75-01-4 | 1 year | 0.2 | 6 |
| Vinyl chloride | 75-01-4 | 24 hour | 1 | 6 |
| Vinyl toluene (o-, m-, p-) | 611-15-4 | 1200 | 7 | |
| VOC Total | Chronical | 500 | 2 | |
| Warfarin | 81-81-2 | 24 hour | 10 | 6 |
| Xylene (o-, m-, p-) and mix of o-, m- and p-xylene isomers | 1330-20-7 | 500 | 7 | |
| Xylenes | 1330-20-7 | 24 hour | 730 | 6 |
| Xylenes (mixed) | 1330-20-7 | Chronical | 100 | 5 |
| Xylenes (technical mixture) | 1330-20-7 | 1 year | 700 | 3 |
| Xylenes, technical mixture(m-, o-, p-xylene combined) | 1330-20-7 | 24 hour | 700 | 2 |
| Zinc | 7440-66-6 | 24 hour | 120 | 6 |
| Zinc stearate | 557-05-1 | 24 hour | 35 | 6 |
| # | Source |
| 1 | 2005 Ontario Asbestos Regulation 278/05 |
| 2 | 2017 LEED v4 |
| 3 | 2019 OEHHA Acute, 8-hour and Chronic Reference Exposure Level (REL) Summary |
| 4 | 2020 Residential indoor air quality guidelines, Government of Canada |
| 5 | 2020 Indoor Air Reference Levels, Government Of Canada |
| 6 | 2020 AMBIENT AIR QUALITY CRITERIA, ontario, Canada |
| 7 | 2023 List of “Lowest Concentration of Interest” (LCI) values, European Comission |
| 8 | 2010 WHO guidelines for indoor air quality: selected pollutants |
LCS Laboratory Inc. has extensive experience conducting residential and industrial indoor air quality investigations. If you would like to discuss an air sampling project or need guidance on selecting appropriate methods, please contact us.
