1 75-07-0Acetaldehyde50024-HourHealth<abbr title = "not applicable">N/A</abbr> 1 75-07-0Acetaldehyde500½-HourHealth<abbr title = "not applicable">N/A</abbr> 2 64-19-7Acetic acid2,50024-HourOdourTo be updated 3 67-64-1Acetone11,88024-HourHealth<abbr title = "not applicable">N/A</abbr> 4 75-05-8Acetonitrile7024-HourHealth<abbr title = "not applicable">N/A</abbr> 5 98-86-2Acetophenone1,1671-HourHealth<abbr title = "not applicable">N/A</abbr> 5 98-86-2Acetophenone85010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 6 74-86-2Acetylene56,00024-HourOdourTo be updated 7 107-02-8Acrolein0.424-HourHealth<abbr title = "not applicable">N/A</abbr> 7 107-02-8Acrolein4.51-HourHealth<abbr title = "not applicable">N/A</abbr> 8 79-06-1Acrylamide1524-HourHealth<abbr title = "not applicable">N/A</abbr> 9 107-13-1Acrylonitrile0.12AnnualHealth<abbr title = "not applicable">N/A</abbr> 9 107-13-1Acrylonitrile0.624-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 10 124-04-9Adipic acid1,16724-HourHealth<abbr title = "not applicable">N/A</abbr> 11 <abbr title = "not applicable">N/A</abbr>Alkyltoluene sulphonamide, N-12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 12 106-92-3Allyl glycidyl ether6024-HourHealth<abbr title = "not applicable">N/A</abbr> 13 300-92-5Aluminum distearate2,18024-HourHealth<abbr title = "not applicable">N/A</abbr> 14 1344-28-1Aluminum oxide12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 15 7047-84-9Aluminum stearate2,18024-HourHealth<abbr title = "not applicable">N/A</abbr> 16 637-12-7Aluminum tristearate2,18024-HourHealth<abbr title = "not applicable">N/A</abbr> 17 7664-41-7Ammonia10024-HourHealth<abbr title = "not applicable">N/A</abbr> 18 12125-02-9Ammonium chloride12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 19 123-92-2Amyl acetate, iso-53,20024-HourHealth & Odour<abbr title = "not applicable">N/A</abbr> 20 628-63-7Amyl acetate, n-53,20024-HourHealth & Odour<abbr title = "not applicable">N/A</abbr> 21 626-38-0Amyl acetate, secondary66,50024-HourHealth & Odour<abbr title = "not applicable">N/A</abbr> 22 7440-36-0Antimony2524-HourHealth<abbr title = "not applicable">N/A</abbr> 23 7440-38-2Arsenic and compounds0.324-HourHealth<abbr title = "not applicable">N/A</abbr> 24 7784-42-1Arsine524-HourHealth<abbr title = "not applicable">N/A</abbr> 24 7784-42-1Arsine10½-HourHealth<abbr title = "not applicable">N/A</abbr> 25 1332-21-4Asbestos (fibres > 5 <abbr title = "micrometres">µm</abbr> in length)0.04 fibres/<abbr title = "cubic centimetres">cm³</abbr>24-HourHealth<abbr title = "not applicable">N/A</abbr> 26 7440-39-3Barium - total water soluble1024-HourHealth<abbr title = "not applicable">N/A</abbr> 27 71-43-2Benzene0.45AnnualHealth<abbr title = "not applicable">N/A</abbr> 27 71-43-2Benzene2.324-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 28 50-32-8Benzo(a)pyrene [as a surrogate of total Polycyclic Aromatic Hydrocarbons (<abbr>PAH</abbr>s)]0.00001AnnualHealth<abbr title = "Benzo(a)pyrene">B[a]P</abbr> is used as a surrogate for the total carcinogenicity of <abbr title = "Polycyclic Aromatic Hydrocarbons">PAH</abbr>s; this <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> does not apply to naphthalene (<abbr title = "Chemical Abstracts Service Registry Number">CASRN</abbr> 91-20-3) nor for any other <abbr title = "Polycyclic Aromatic Hydrocarbons">PAH</abbr> for which an <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> may be derived separately 28 50-32-8Benzo(a)pyrene [as a surrogate of total Polycyclic Aromatic Hydrocarbons (<abbr>PAH</abbr>s)]0.0000524-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 29 65-85-0Benzoic acid70024-HourHealth<abbr title = "not applicable">N/A</abbr> 30 95-16-9Benzothiazole7024-HourHealth<abbr title = "not applicable">N/A</abbr> 31 98-88-4Benzoyl chloride12524-HourCorrosion & Health<abbr title = "not applicable">N/A</abbr> 32 100-51-6Benzyl alcohol88024-HourHealth<abbr title = "not applicable">N/A</abbr> 33 7440-41-7Beryllium and beryllium compounds0.0124-HourHealth<abbr title = "not applicable">N/A</abbr> 34 92-52-4Biphenyl601-HourOdourTo be updated 35 1303-96-4Borax3324-HourHealth<abbr title = "not applicable">N/A</abbr> 36 10043-35-3Boric acid3324-HourHealth<abbr title = "not applicable">N/A</abbr> 37 7440-42-8Boron12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 38 10294-33-4Boron tribromide3524-HourCorrosion<abbr title = "not applicable">N/A</abbr> 39 10294-34-5Boron trichloride3524-HourCorrosion<abbr title = "not applicable">N/A</abbr> 40 7637-07-02Boron trifluoride224-HourVegetation<abbr title = "not applicable">N/A</abbr> 41 314-40-9Bromacil1024-HourHealth<abbr title = "not applicable">N/A</abbr> 42 7726-95-6Bromine2024-HourHealth<abbr title = "not applicable">N/A</abbr> 43 75-25-2Bromoform5524-HourHealth<abbr title = "not applicable">N/A</abbr> 44 106-99-0Butadiene, 1,3-2AnnualHealth<abbr title = "not applicable">N/A</abbr> 44 106-99-0Butadiene, 1,3-1024-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 45 71-36-3Butanol, n-92024-HourHealth<abbr title = "not applicable">N/A</abbr> 45 71-36-3Butanol, n-2,10010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 46 75-65-0Butanol, tertiary30,30024-HourHealth<abbr title = "not applicable">N/A</abbr> 47 5131-66-8Butoxy-2-propanol, 1-3,30024-HourHealth<abbr title = "not applicable">N/A</abbr> 48 123-86-4Butyl acetate, n-15,0001-HourHealth<abbr title = "not applicable">N/A</abbr> 48 123-86-4Butyl acetate, n-1,00010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 49 141-32-2Butyl acrylate12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 50 3622-84-2Butyl benzene sulphonamide, N-3524-HourHealth<abbr title = "not applicable">N/A</abbr> 51 85-68-7Butyl benzene phthalate15024-HourHealth<abbr title = "not applicable">N/A</abbr> 52 123-95-5Butyl stearate12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 53 7440-43-9Cadmium and cadmium compounds0.005AnnualHealth<abbr title = "not applicable">N/A</abbr> 53 7440-43-9Cadmium and cadmium compounds0.02524-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 54 75-20-7Calcium carbide1024-HourCorrosion<abbr title = "not applicable">N/A</abbr> 55 592-01-8Calcium cyanide (as total salt)12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 56 1305-62-0Calcium hydroxide13.524-HourCorrosion<abbr title = "not applicable">N/A</abbr> 57 1305-78-8Calcium oxide1024-HourCorrosion<abbr title = "not applicable">N/A</abbr> 58 1592-23-0Calcium stearate3524-HourHealth<abbr title = "not applicable">N/A</abbr> 59 133-06-2Captan2524-HourHealth<abbr title = "not applicable">N/A</abbr> 60 1333-86-4Carbon black1024-HourSoiling<abbr title = "not applicable">N/A</abbr> 61 75-15-0Carbon disulphide33024-HourOdourTo be updated 62 630-08-0Carbon monoxide15,700 (13 <abbr title = "parts per million">ppm</abbr>)8-HourHealth<abbr title = "not applicable">N/A</abbr> 62 630-08-0Carbon monoxide36,200 (30 <abbr title = "parts per million">ppm</abbr>)1-HourHealth<abbr title = "not applicable">N/A</abbr> 63 56-23-5Carbon tetrachloride2.424-HourHealth<abbr title = "not applicable">N/A</abbr> 64 133-90-4Chloramben12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 65 57-74-9Chlordane524-HourHealth<abbr title = "not applicable">N/A</abbr> 66 7782-50-5Chlorine1024-HourHealth<abbr title = "not applicable">N/A</abbr> 66 7782-50-5Chlorine23010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 67 10049-04-4Chlorine dioxide224-HourHealth<abbr title = "not applicable">N/A</abbr> 68 75-45-6Chlorodifluoromethane (Freon 22)350,00024-HourHealthSee <abbr title = "Ontario Regulation">O. Reg.</abbr> 463/10 for Ozone Depleting Substances and Other Halocarbons for further restrictions on these, and several other ozone-depleting substances 69 75-00-3Chloroethane5,60024-HourHealth<abbr title = "not applicable">N/A</abbr> 70 67-66-3Chloroform0.2AnnualHealth<abbr title = "not applicable">N/A</abbr> 70 67-66-3Chloroform124-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 71 18540-29-9Chromium compounds (hexavalent forms; <abbr title = "chromium hexavalent">CrVI</abbr>) 0.00007 (as <abbr title = "particulate matter">PM</abbr>₁₀); 0.00014 (as <abbr title = "suspended particulate matter">SPM</abbr>)AnnualHealthApplies to either <abbr title = "chromium hexavalent">CrVI</abbr> forms only, or to the percentage of <abbr title = "chromium hexavalent">CrVI</abbr> species relative to total chromium 71 18540-29-9Chromium compounds (hexavalent forms; <abbr title = "chromium hexavalent">CrVI</abbr>)0.00035 (as <abbr title = "particulate matter">PM</abbr>₁₀); 0.0007 (as <abbr title = "suspended particulate matter">SPM</abbr>)24-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 72 7440-47-3Chromium compounds (metallic, divalent and trivalent forms)0.524-HourHealthApplies to either chromium metallic (<abbr title = "Chemical Abstracts Service Registry Number">CASRN</abbr> 7440-47-3), divalent (<abbr title = "Chemical Abstracts Service Registry Number">CASRN</abbr> 22541-79-3), and trivalent (<abbr title = "Chemical Abstracts Service Registry Number">CASRN</abbr> 16065-83-1), or to the percentage of <abbr title = "Chromium">Cr</abbr> metallic, divalent and trivalent relative to total chromium 73 77-92-9Citric acid12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 73 77-92-9Citric acid3001-HourHealth<abbr title = "not applicable">N/A</abbr> 74 8007-45-2Coal tar pitch volatiles - soluble fraction0.2AnnualHealth<abbr title = "not applicable">N/A</abbr> 74 8007-45-2Coal tar pitch volatiles - soluble fraction124-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 75 7440-48-4Cobalt0.124-HourHealth<abbr title = "not applicable">N/A</abbr> 76 7440-50-8Copper5024-HourHealth<abbr title = "not applicable">N/A</abbr> 77 1319-77-3Cresols7524-HourHealthApplies to the following isomers, individually or as a mixture: o-cresol (<abbr title = "Chemical Abstracts Service Registry Number">CASRN</abbr> 95-48-7), p-cresol (<abbr title = "Chemical Abstracts Service Registry Number">CASRN</abbr> 106-44-5), and m-cresol (<abbr title = "Chemical Abstracts Service Registry Number">CASRN</abbr> 108-39-4) 78 506-77-4Cyanogen chloride1224-HourHealth<abbr title = "not applicable">N/A</abbr> 79 110-82-7Cyclohexane6,10024-HourHealth<abbr title = "not applicable">N/A</abbr> 80 127-20-8Dalapon sodium salt5024-HourHealth<abbr title = "not applicable">N/A</abbr> 81 17702-41-9Decaborane2524-HourHealth<abbr title = "not applicable">N/A</abbr> 82 124-18-5Decane, n-60,0001-HourHealth & Odour<abbr title = "not applicable">N/A</abbr> 83 872-05-9Decene, 1-60,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 84 1395-21-7Detergent enzyme (Subtilisin)0.0624-HourHealth<abbr title = "not applicable">N/A</abbr> 85 123-42-2Diacetone alcohol1,35010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 86 333-41-5Diazinon324-HourHealth<abbr title = "not applicable">N/A</abbr> 87 19287-45-7Diborane1024-HourHealth<abbr title = "not applicable">N/A</abbr> 88 111-92-2Dibutyl amine2,6451-HourHealth<abbr title = "not applicable">N/A</abbr> 89 84-74-2Dibutyl phthalate (DBP, di-n- butyl phthalate)5024-HourHealth<abbr title = "not applicable">N/A</abbr> 90 77-58-7Dibutyltin dilaurate3024-HourHealth<abbr title = "not applicable">N/A</abbr> 91 131-15-7Dicapryl phthalate12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 92 95-50-1Dichlorobenzene, 1,2-30,5001-HourHealth<abbr title = "not applicable">N/A</abbr> 93 106-46-7Dichlorobenzene, 1,4-9524-HourHealth<abbr title = "not applicable">N/A</abbr> 94 75-34-3Dichloroethane, 1,1-16524-HourHealth<abbr title = "not applicable">N/A</abbr> 95 156-59-2Dichloroethylene, cis-1,2-10524-HourHealth<abbr title = "not applicable">N/A</abbr> 96 540-59-0Dichloroethylene, sym-1,2-10524-HourHealth<abbr title = "not applicable">N/A</abbr> 97 156-60-5Dichloroethylene, trans-1,2-10524-HourHealth<abbr title = "not applicable">N/A</abbr> 98 76-14-2Dichloro-1,1,2,2-tetrafluoroethane, 1,2- (Freon 114)700,00024-HourHealthSee <abbr title = "Ontario Regulation">O. Reg.</abbr> 463/10 for Ozone Depleting Substances and Other Halocarbons for further restrictions on these, and several other ozone-depleting substances 99 109-89-7Diethyl amine2,9101-HourHealth<abbr title = "not applicable">N/A</abbr> 100 112-34-5Diethylene glycol monobutyl ether6524-HourHealth<abbr title = "not applicable">N/A</abbr> 101 124-17-4Diethylene glycol monobutyl ether acetate8524-HourHealth<abbr title = "not applicable">N/A</abbr> 102 111-90-0Diethylene glycol monoethyl ether1,10010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 103 112-15-2Diethylene glycol monoethyl ether acetate1,80024-HourHealth<abbr title = "not applicable">N/A</abbr> 104 111-77-3Diethylene glycol monomethyl ether1,20024-HourHealth<abbr title = "not applicable">N/A</abbr> 105 117-81-7Di(2-ethylhexyl) phthalate5024-HourHealth<abbr title = "not applicable">N/A</abbr> 106 84-66-2Diethyl phthalate (<abbr>DEP</abbr>)12524-HourHealth<abbr title = "not applicable">N/A</abbr> 107 75-71-8Difluorodichloromethane (Freon 12)500,00024-HourHealthSee <abbr title = "Ontario Regulation">O. Reg.</abbr> 463/10 for Ozone Depleting Substances and Other Halocarbons for further restrictions on these, and several other ozone-depleting substances 108 84-75-3Dihexyl phthalate (<abbr>DHP</abbr>)5024-HourHealth<abbr title = "not applicable">N/A</abbr> 109 108-83-8Diisobutyl ketone3,50024-HourHealth<abbr title = "not applicable">N/A</abbr> 109 108-83-8Diisobutyl ketone64910-MinuteOdour<abbr title = "not applicable">N/A</abbr> 110 127-19-5Dimethyl acetamide, N,N-30024-HourHealth<abbr title = "not applicable">N/A</abbr> 111 124-40-3Dimethyl amine1,8401-HourHealth & Odour<abbr title = "not applicable">N/A</abbr> 112 109-55-7Dimethyl-1,3-diamino propane, N,N-2024-HourHealth<abbr title = "not applicable">N/A</abbr> 113 624-92-0Dimethyl disulphide5610-MinuteOdour<abbr title = "not applicable">N/A</abbr> 114 115-10-6Dimethyl ether2,10024-HourOdourTo be updated 115 756-79-6Dimethyl methylphosphonate87524-HourHealth<abbr title = "not applicable">N/A</abbr> 116 131-11-3Dimethyl phthalate (<abbr>DMP</abbr>)12524-HourHealth<abbr title = "not applicable">N/A</abbr> 117 67-68-5Dimethyl sulfoxide2,10024-HourHealth<abbr title = "not applicable">N/A</abbr> 118 75-18-3Dimethyl sulphide3010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 119 117-84-0Di-n-octyl phthalate12024-HourHealth & Particulate<abbr title = "not applicable">N/A</abbr> 120 123-91-1Dioxane3,50024-HourHealth<abbr title = "not applicable">N/A</abbr> 121 <abbr title = "not applicable">N/A</abbr>Dioxins, furans and dioxin-like <abbr title="Polychlorinated biphenyls">PCBs</abbr>0.1 <abbr title = "picograms">pg</abbr> <abbr title="toxicity equivalent per cubic metre">TEQ/m³</abbr>24-HourHealthSee the Appendix for applicable contaminants and calculation of total concentration of dioxins, furans and dioxin-like <abbr title="Polychlorinated biphenyls">PCBs</abbr> 122 646-06-0Dioxolane-1,31024-HourHealth<abbr title = "not applicable">N/A</abbr> 123 122-39-4Diphenylamine17.524-HourHealth<abbr title = "not applicable">N/A</abbr> 124 85-00-7Diquat dibromide – respirable0.03224-HourHealth<abbr title = "not applicable">N/A</abbr> 124 85-00-7Diquat dibromide - total0.1624-HourHealth<abbr title = "not applicable">N/A</abbr> 125 1886-81-3Dodecyl benzene sulphonic acid12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 126 2439-10-3Dodine1024-HourHealth<abbr title = "not applicable">N/A</abbr> 127 548-73-2Droperidol124-HourHealth<abbr title = "not applicable">N/A</abbr> 128 <abbr title = "not applicable">N/A</abbr>Dustfall4.6 <abbr title = "grams per metre squared">g/m²</abbr>AnnualSoilingValue is the arithmetic mean of 30-day collection periods over an annual averaging time 128 <abbr title = "not applicable">N/A</abbr>Dustfall7 <abbr title = "grams per metre squared">g/m²</abbr>30-DaySoilingValue is compared against any 30-day collection period 129 64-17-5Ethanol (Ethyl alcohol)19,0001-HourOdourTo be updated 130 141-78-6Ethyl acetate19,0001-HourOdourTo be updated 131 140-88-5Ethyl acrylate4.51-HourOdourTo be updated 132 84-51-5Ethylanthraquinone, 2-1024-HourHealth<abbr title = "not applicable">N/A</abbr> 133 100-41-4Ethyl benzene1,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 133 100-41-4Ethyl benzene1,90010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 134 74-85-1Ethylene4024-HourVegetation<abbr title = "not applicable">N/A</abbr> 135 106-93-4Ethylene dibromide324-HourHealth<abbr title = "not applicable">N/A</abbr> 136 107-06-2Ethylene dichloride0.4AnnualHealth<abbr title = "not applicable">N/A</abbr> 136 107-06-2Ethylene dichloride224-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 137 107-21-1Ethylene glycol12,70024-HourHealth<abbr title = "not applicable">N/A</abbr> 138 111-76-2Ethylene glycol butyl ether (Butyl cellosolve)2,40024-HourHealth<abbr title = "not applicable">N/A</abbr> 138 111-76-2Ethylene glycol butyl ether (Butyl cellosolve)50010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 138 112-07-2Ethylene glycol butyl ether acetate (Butyl cellosolve acetate)3,25024-HourHealth<abbr title = "not applicable">N/A</abbr> 138 112-07-2Ethylene glycol butyl ether acetate (Butyl cellosolve acetate)70010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 139 628-96-6Ethylene glycol dinitrate324-HourHealth<abbr title = "not applicable">N/A</abbr> 140 110-80-5Ethylene glycol ethyl ether (Cellosolve)38024-HourHealth<abbr title = "not applicable">N/A</abbr> 140 110-80-5Ethylene glycol ethyl ether (Cellosolve)1,10010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 141 111-15-9Ethylene glycol ethyl ether acetate (Cellosolve acetate )54024-HourHealth<abbr title = "not applicable">N/A</abbr> 141 111-15-9Ethylene glycol ethyl ether acetate (Cellosolve acetate )30010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 142 112-25-4Ethylene glycol monohexyl ether2,50024-HourHealth<abbr title = "not applicable">N/A</abbr> 143 75-21-8Ethylene oxide0.04AnnualHealth<abbr title = "not applicable">N/A</abbr> 143 75-21-8Ethylene oxide0.224-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 144 60-00-4Ethylenediaminetetra acetic acid12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 145 60-29-7Ethyl ether8,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 145 60-29-7Ethyl ether95010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 146 763-69-9Ethyl-3-ethoxy propionate20010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 147 104-76-7Ethyl hexanol, 2-6001-HourOdourTo be updated 148 990-73-8Fentanyl citrate0.0224-HourHealth<abbr title = "not applicable">N/A</abbr> 149 1309-37-1Ferric oxide2524-HourSoiling<abbr title = "not applicable">N/A</abbr> 150 7664-39-3Fluoridation – Total fluorides (Growing season)40 <abbr title = "micrograms">µg</abbr>/100 <abbr title = "centimetres squared">cm²</abbr>30-DayVegetationThe growing season is from May 1 to September 30 in Northern Ontario (Northern Region), and from April 1 to October 31 in Southern Ontario (South West, West Central, East & Central Regions) 150 7664-39-3Fluoridation – Total fluorides (Non-growing Season)80 <abbr title = "micrograms">µg</abbr>/100 <abbr title = "centimetres squared">cm²</abbr>30-DayVegetationThe non-growing season which is from October 1 to April 30 in Northern Ontario (Northern Region), and from November 1 to March 31 in Southern Ontario (South West, West Central, East & Central Regions) 150 7664-39-3Fluorides (as <abbr title = "Hydrofluoride">HF</abbr>) – Gaseous (growing season)0.34 (0.4 <abbr title = "parts per billion">ppb</abbr>)30-DayVegetationSee Fluoridation note above on growing season 150 7664-39-3Fluorides (as <abbr title = "Hydrofluoride">HF</abbr>) – Gaseous (growing season)0.86 (1 <abbr title = "parts per billion">ppb</abbr>)24-HourHealthConverted from the 30-day <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> for Fluorides (as <abbr title = "Hydrofluoride">HF</abbr>) – Gaseous (growing season) to allow assessment of 24-hour air quality data 150 7664-39-3Fluorides (as <abbr title = "Hydrofluoride">HF</abbr>) – Total (growing season)0.69 (0.8 <abbr title = "parts per billion">ppb</abbr>)30-DayVegetationSee Fluoridation note above on growing season 150 7664-39-3Fluorides (as <abbr title = "Hydrofluoride">HF</abbr>) – Total (growing season)1.72 (2 <abbr title = "parts per billion">ppb</abbr>)24-HourVegetationConverted from the 30-day <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> for Fluorides (as <abbr title = "Hydrofluoride">HF</abbr>) – Total (growing season) to allow assessment of 24-hour air quality data 150 7664-39-3Fluorides (as <abbr title = "Hydrofluoride">HF</abbr>) – Total (non-growing season)1.38 (1.6 <abbr title = "parts per billion">ppb</abbr>)30-DayVegetationSee Fluoridation note above on non-growing season 150 7664-39-3Fluorides (as <abbr title = "Hydrofluoride">HF</abbr>) – Total (non-growing season)3.44 (4 <abbr title = "parts per billion">ppb</abbr>)24-HourVegetationConverted from the 30-day <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> for Fluorides (as <abbr title = "Hydrofluoride">HF</abbr>) – Total (non-growing season) to allow assessment of 24-hour air quality data 150 7664-39-3Fluorides in dry forage – Dry weight60 <abbr title = "parts per million">ppm</abbr>60-DayEffects on animalsAverage of 2 consecutive months 150 7664-39-3Fluorides in dry forage – Dry weight35 <abbr title = "parts per million">ppm</abbr>30-DayEffects on animalsAverage over a growing season 150 7664-39-3Fluorides in dry forage – Dry weight80 <abbr title = "parts per million">ppm</abbr>30-DayEffects on animalsAverage results for any single month 151 <abbr title = "not applicable">N/A</abbr>Fluorinert 3M-FC-7012024-HourParticulate<abbr title = "not applicable">N/A</abbr> 152 50-00-0Formaldehyde6524-HourHealth<abbr title = "not applicable">N/A</abbr> 153 64-18-6Formic acid50024-HourHealth<abbr title = "not applicable">N/A</abbr> 154 98-01-1Furfural1,0001-HourOdourTo be updated 155 98-00-0Furfuryl alcohol1,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 156 111-30-8Glutaraldehyde1424-HourHealth<abbr title = "not applicable">N/A</abbr> 156 111-30-8Glutaraldehyde351-HourHealthConverted from the 24-hour <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 1-hour air quality data 157 52-86-8Haloperidol0.124-HourHealth<abbr title = "not applicable">N/A</abbr> 158 142-82-5Heptane, n-11,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 159 77-47-4Hexachlorocyclopentadiene224-HourHealth<abbr title = "not applicable">N/A</abbr> 160 999-97-3Hexamethyl disilazane224-HourHealth<abbr title = "not applicable">N/A</abbr> 161 4035-89-6HDI Biuret (<abbr>HDI-BT</abbr>)324-HourHealth<abbr title = "not applicable">N/A</abbr> 162 3779-63-3HDI Isocyanurate (<abbr>HDI-IC</abbr>)324-HourHealth<abbr title = "not applicable">N/A</abbr> 163 822-06-0Hexamethylene diisocyanate (<abbr>HDI</abbr>) monomer0.0324-HourHealth<abbr title = "not applicable">N/A</abbr> 164 28182-81-2<abbr title = "Hexamethylene diisocyanate">HDI</abbr> Polyisocyanate (<abbr title = "HDI Biuret">HDI-BT</abbr> and <abbr title = "HDI Isocyanurate">HDI-IC</abbr>)324-HourHealth<abbr title = "not applicable">N/A</abbr> 165 124-09-4Hexamethylenediamine1624-HourHealth<abbr title = "not applicable">N/A</abbr> 166 111-49-9Hexamethyleneimine31524-HourHealth<abbr title = "not applicable">N/A</abbr> 167 110-54-3Hexane, n- (n-Hexane and hexane isomers only)7,50024-HourHealth<abbr title = "not applicable">N/A</abbr> 167 110-54-3Hexane, n- (part of a mixture)2,50024-HourHealth<abbr title = "not applicable">N/A</abbr> 168 107-41-5Hexylene glycol12,0001-HourHealth<abbr title = "not applicable">N/A</abbr> 169 10035-10-6Hydrogen bromide6681-HourHealth<abbr title = "not applicable">N/A</abbr> 170 7647-01-0Hydrogen chloride2024-HourHealth<abbr title = "not applicable">N/A</abbr> 171 74-90-8Hydrogen cyanide824-HourHealth<abbr title = "not applicable">N/A</abbr> 172 7722-84-1Hydrogen peroxide3024-HourHealth<abbr title = "not applicable">N/A</abbr> 173 7783-06-5Hydrogen sulphide724-HourHealth<abbr title = "not applicable">N/A</abbr> 173 7783-06-5Hydrogen sulphide1310-MinuteOdour<abbr title = "not applicable">N/A</abbr> 174 7439-89-6Iron (metallic)424-HourHealth<abbr title = "not applicable">N/A</abbr> 175 78-83-1Isobutanol4,60024-HourHealth<abbr title = "not applicable">N/A</abbr> 175 78-83-1Isobutanol2,34010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 176 110-19-0Isobutyl acetate1,66010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 177 67-63-0Isopropanol (Isopropyl alcohol)7,30024-HourHealth<abbr title = "not applicable">N/A</abbr> 178 108-21-4Isopropyl acetate2,00010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 179 98-82-8Isopropyl benzene40024-HourHealth<abbr title = "not applicable">N/A</abbr> 180 108-20-3Isopropyl ether110,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 181 7439-92-1Lead and lead compounds0.230-DayHealthAs arithmetic mean of a 30-day period 181 7439-92-1Lead and lead compounds0.524-HourHealthConverted from the 30-day <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 182 58-89-9Lindane (Hexachlorocyclohexane)524-HourHealth<abbr title = "not applicable">N/A</abbr> 183 7439-93-2Lithium (other than hydrides)2024-HourHealth<abbr title = "not applicable">N/A</abbr> 184 7580-67-8Lithium hydrides2.524-HourHealth<abbr title = "not applicable">N/A</abbr> 185 1309-48-4Magnesium oxide12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 186 557-04-0Magnesium stearate3524-HourHealth<abbr title = "not applicable">N/A</abbr> 187 121-75-5Malathion12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 188 108-31-6Maleic anhydride3024-HourHealth<abbr title = "not applicable">N/A</abbr> 189 7439-96-5Manganese and manganese compounds0.1 (as <abbr title = "particulate matter">PM</abbr>_2.5); 0.2 (as <abbr title = "particulate matter">PM</abbr>₁₀); 0.4 (as <abbr title = "suspended particulate matter">SPM</abbr>)24-HourHealthDoes not apply to <abbr title = "Methylcyclopentadienyl manganese tricarbonyl">MMT</abbr> (<abbr title = "Chemical Abstracts Service Registry Number">CASRN</abbr> 12108-13-3) 190 <abbr title = "not applicable">N/A</abbr>Mercaptans1310-MinuteOdourMercaptan means any organic compound that contains a thiol group; mercaptans are expressed as methyl mercaptan and are calculated as follow: A = <abbr title = "the sum of">Σ</abbr> ((B × 48) ÷ C), where A = the amount (or concentration) of total mercaptans, expressed as methyl mercaptan, B = the amount (or concentration) of each mercaptan, and C = the molecular weight of each mercaptan 191 120-78-5Mercaptobenzothiazole disulphide12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 192 7439-97-6Mercury (<abbr>Hg</abbr>)224-HourHealth<abbr title = "not applicable">N/A</abbr> 192 7439-97-6Mercury (as <abbr>Hg</abbr>) – alkyl compounds0.524-HourHealth<abbr title = "not applicable">N/A</abbr> 193 108-62-3Metaldehyde (Acetaldehyde tetramer)12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 194 79-41-4Methacrylic acid2,00024-HourOdourTo be updated 195 101-68-8Methane diphenyl diisocyanate (<abbr>MDI</abbr> monomer)0.724-HourHealth<abbr title = "not applicable">N/A</abbr> 196 67-56-1Methanol (Methyl alcohol)4,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 197 70657-70-4Methoxy-1-propyl acetate, 2-1,53024-HourHealth<abbr title = "not applicable">N/A</abbr> 198 72-43-5Methoxychlor12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 199 96-33-3Methyl acrylate41-HourOdourTo be updated 200 109-87-5Methylal6,20024-HourHealth<abbr title = "not applicable">N/A</abbr> 201 74-83-9Methyl bromide1,35024-HourHealth<abbr title = "not applicable">N/A</abbr> 202 74-87-3Methyl chloride32024-HourHealth<abbr title = "not applicable">N/A</abbr> 203 71-55-6Methyl chloroform (1,1,1- Trichloroethane)115,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 204 12108-13-3Methylcyclopentadienyl manganese tricarbonyl (<abbr>MMT</abbr>)1024-HourHealth<abbr title = "not applicable">N/A</abbr> 205 101-14-4Methylene-bis-2-chloroaniline, 4,4-1024-HourHealth<abbr title = "not applicable">N/A</abbr> 206 75-09-2Methylene chloride44AnnualHealth<abbr title = "not applicable">N/A</abbr> 206 75-09-2Methylene chloride22024-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 207 101-77-9Methylene dianiline1024-HourHealth<abbr title = "not applicable">N/A</abbr> 208 75-11-6Methylene iodide6524-HourHealth<abbr title = "not applicable">N/A</abbr> 209 78-93-3Methyl ethyl ketone (2- Butanone)1,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 210 1338-23-4Methyl ethyl ketone peroxide2001-HourHealth<abbr title = "not applicable">N/A</abbr> 210 1338-23-4Methyl ethyl ketone peroxide8024-HourHealth<abbr title = "not applicable">N/A</abbr> 211 110-12-3Methyl-2-hexanone, 5-63010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 212 624-83-9Methyl isocyanate124-HourHealth<abbr title = "not applicable">N/A</abbr> 213 108-10-1Methyl isobutyl ketone1,20024-HourOdourTo be updated 214 80-62-6Methyl methacrylate86024-HourOdourTo be updated 215 872-50-4Methyl-2-pyrrolidone, N-40,0001-HourHealth<abbr title = "not applicable">N/A</abbr> 216 119-36-8Methyl salicylate10024-HourHealth<abbr title = "not applicable">N/A</abbr> 217 98-83-9Methyl styrene, alpha24,0001-HourHealth<abbr title = "not applicable">N/A</abbr> 218 1634-04-4Methyl tert-butyl ether7,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 219 110-43-0Methyl-n-amyl ketone4,60024-HourHealth<abbr title = "not applicable">N/A</abbr> 220 22832-87-7Miconazole nitrate524-HourHealth<abbr title = "not applicable">N/A</abbr> 221 <abbr title = "not applicable">N/A</abbr>Mineral spirits2,60024-HourHealth“Mineral spirits” is defined as a petroleum distillate mixture of C₇ to C₁₂ alkanes (paraffins) and cycloalkanes (naphthenes) where the mixture is in the range from 5 to 20 % aromatics by weight, is less than 0.1 % benzene by weight, has a boiling point in the range from 130 to 220 <abbr title = "degrees celsius">°C</abbr> and has a flash point in the range from 21 to 60 <abbr title = "degress celsius">°C</abbr> 222 7439-98-7Molybdenum12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 223 108-90-7Monochlorobenzene3,5001-HourHealth<abbr title = "not applicable">N/A</abbr> 223 108-90-7Monochlorobenzene4,50010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 224 74-89-5Monomethyl amine2524-HourOdourTo be updated 225 91-20-3Naphthalene22.524-HourHealth<abbr title = "not applicable">N/A</abbr> 225 91-20-3Naphthalene5010-MinuteOdour<abbr title = "not applicable">N/A</abbr> 226 90-15-3Naphthol, alpha-10024-HourHealth<abbr title = "not applicable">N/A</abbr> 227 7440-02-0Nickel and nickel compounds0.02 (as <abbr title = "particulate matter">PM</abbr>₁₀); 0.04 (as <abbr title = "suspended particulate matter">SPM</abbr>)AnnualHealthDoes not apply to nickel carbonyl (<abbr title="Chemical Abstracts Service Registry Number">CASRN</abbr> 13463-39-3) 227 7440-02-0Nickel and nickel compounds0.1 (as <abbr title = "particulate matter">PM</abbr>₁₀); 0.2 (as <abbr title = "suspended particulate matter">SPM</abbr>)24-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 228 13463-39-3Nickel carbonyl0.524-HourHealth<abbr title = "not applicable">N/A</abbr> 229 7697-37-2Nitric acid3524-HourCorrosion<abbr title = "not applicable">N/A</abbr> 230 139-13-9Nitrilotriacetic acid12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 231 10102-44-0Nitrogen dioxide200 (0.10 <abbr title = "parts per milion">ppm</abbr>)24-HourHealthFor monitored ambient air levels; for modelled data, estimates of total nitrogen oxides (<abbr>NOx</abbr>) should be compared to this <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> unless sufficient information is available to reliably estimate maximum <abbr title = "nitrogen dioxide">NO2</abbr> concentrations 231 10102-44-0Nitrogen dioxide400 (0.20 <abbr title = "parts per million">ppm</abbr>)1-HourHealthSee note above 232 55-63-0Nitroglycerin324-HourHealth<abbr title = "not applicable">N/A</abbr> 233 10024-97-2Nitrous oxide9,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 234 111-65-9Octane61,80010-minuteOdour<abbr title = "not applicable">N/A</abbr> 235 111-66-0Octene, 1-50,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 236 112-80-1Oleic acid51-HourHealth<abbr title = "not applicable">N/A</abbr> 237 144-62-7Oxalic acid2524-HourHealth<abbr title = "not applicable">N/A</abbr> 238 90438-79-2Oxo-heptyl acetate8524-HourHealth<abbr title = "not applicable">N/A</abbr> 239 88230-35-7Oxo-hexyl acetate8524-HourHealth<abbr title = "not applicable">N/A</abbr> 240 10028-15-6Ozone165 (0.080 <abbr title = "parts per million">ppm</abbr>)1-HourHealth<abbr title = "not applicable">N/A</abbr> 241 7647-10-1Palladium - water soluble compounds1024-HourHealth<abbr title = "not applicable">N/A</abbr> 242 1910-42-5Paraquat dichloride – respirable0.00324-HourHealth<abbr title = "not applicable">N/A</abbr> 242 1910-42-5Paraquat dichloride – total0.01524-HourHealth<abbr title = "not applicable">N/A</abbr> 243 <abbr title = "not applicable">N/A</abbr>Particulate matter – <abbr>PM</abbr>_2.5 (fine fraction)28 (2015 target); 27 (2020 target)24-HourHealth<abbr title = "Canadian Ambient Air Quality Standards">CAAQS</abbr> - it reflects a 3-year average of the annual 98th percentile of the daily 24-hr average concentrations; this value could also be used “as is” for comparison to the 24-hour measurement of air quality data 243 <abbr title = "not applicable">N/A</abbr>Particulate matter – <abbr>PM</abbr>_2.5 (fine fraction)10.0 (2015 target); 8.8 (2020 target)AnnualHealth<abbr title = "Canadian Ambient Air Quality Standards">CAAQS</abbr> - it reflects a 3-year average of the annual average concentrations; this value could also be used “as is” for comparison to a single annual averaging of air quality data 243 <abbr title = "not applicable">N/A</abbr>Particulate matter – <abbr>PM</abbr>₁₀ (inhalable fraction)5024-HourHealthThis is an interim <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> provided as a guide for decision making, with no conversion to other averaging times 244 1406-05-9Penicillin0.124-HourHealth<abbr title = "not applicable">N/A</abbr> 245 19624-22-7Pentaborane124-HourHealth<abbr title = "not applicable">N/A</abbr> 246 87-86-5Pentachlorophenol2024-HourHealth<abbr title = "not applicable">N/A</abbr> 247 127-18-4Perchloroethylene36024-HourHealth<abbr title = "not applicable">N/A</abbr> 248 108-95-2Phenol3024-HourHealth<abbr title = "not applicable">N/A</abbr> 249 75-44-5Phosgene4524-HourHealth<abbr title = "not applicable">N/A</abbr> 250 7803-51-2Phosphine1024-HourHealth<abbr title = "not applicable">N/A</abbr> 251 7664-38-2Phosphoric acid724-HourHealthExpress as total phosphoric acid calculated in accordance with the following formula: A = B + (C × 1.40), where A = the amount (or concentration) of total phosphoric acid, B = the amount (or concentration) of phosphoric acid, and C = the amount (or concentration) of phosphoric pentoxide 252 10025-87-3Phosphorous oxychloride1224-HourHealth<abbr title = "not applicable">N/A</abbr> 253 10026-13-8Phosphorous pentachloride1024-HourHealth<abbr title = "not applicable">N/A</abbr> 254 85-44-9Phthalic anhydride12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 255 2062-78-4Pimozide124-HourHealth<abbr title = "not applicable">N/A</abbr> 256 7440-06-4Platinum - water soluble compounds0.224-HourHealth<abbr title = "not applicable">N/A</abbr> 257 <abbr title = "not applicable">N/A</abbr>Polybutene-1-sulfone12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 258 1336-36-3Polychlorinated biphenyls (<abbr>PCBs</abbr>)0.035AnnualHealth<abbr title = "not applicable">N/A</abbr> 258 1336-36-3Polychlorinated biphenyls (<abbr>PCBs</abbr>)0.1524-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 259 9010-98-4Polychloroprene50024-HourHealth<abbr title = "not applicable">N/A</abbr> 260 9016-87-9Polymeric methane diphenyl diisocyanate (<abbr>PMDI</abbr>)0.724-HourHealth<abbr title = "not applicable">N/A</abbr> 261 151-50-8Potassium cyanide12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 262 1310-58-3Potassium hydroxide1424-HourCorrosion<abbr title = "not applicable">N/A</abbr> 263 7757-79-1Potassium nitrate12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 264 71-23-8Propanol, n- (Propyl alcohol)16,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 265 123-38-6Propionaldehyde1010-minuteOdour<abbr title = "not applicable">N/A</abbr> 266 79-09-4Propionic acid1001-HourOdourTo be updated 267 123-62-6Propionic anhydride (as Propionic acid)1001-HourOdourTo be updated 268 109-60-4Propyl acetate, n-6,60024-HourHealth<abbr title = "not applicable">N/A</abbr> 269 115-07-1Propylene4,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 270 78-87-5Propylene dichloride2,40024-HourOdourTo be updated 271 57-55-6Propylene glycol12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 272 107-98-2Propylene glycol methyl ether121,00010-minuteOdour<abbr title = "not applicable">N/A</abbr> 273 108-65-6Propylene glycol monomethyl ether acetate5,00024-HourOdourTo be updated 274 75-56-9Propylene oxide0.3AnnualHealth<abbr title = "not applicable">N/A</abbr> 274 75-56-9Propylene oxide1.524-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 275 110-86-1Pyridine15024-HourHealth<abbr title = "not applicable">N/A</abbr> 275 110-86-1Pyridine8010-minuteOdour<abbr title = "not applicable">N/A</abbr> 276 106-51-4Quinone1524-HourHealth<abbr title = "not applicable">N/A</abbr> 277 7782-49-2Selenium1024-HourHealth<abbr title = "not applicable">N/A</abbr> 278 7803-62-5Silane15024-HourHealth<abbr title = "not applicable">N/A</abbr> 279 14464-46-1Silica - respirable (<10 <abbr title = "micrometres">µm</abbr> diameter), cristabolite524-HourHealth<abbr title = "not applicable">N/A</abbr> 280 14808-60-7Silica - respirable (<10 <abbr title = "micrometres">µm</abbr> diameter), quartz524-HourHealth<abbr title = "not applicable">N/A</abbr> 281 15468-32-3Silica - respirable (<10 <abbr title = "micrometres">µm</abbr> diameter), tridymite524-HourHealth<abbr title = "not applicable">N/A</abbr> 282 7440-22-4Silver124-HourHealth<abbr title = "not applicable">N/A</abbr> 283 7631-90-5Sodium bisulphite12024-HourHealth & Particulate<abbr title = "not applicable">N/A</abbr> 284 ‎7775-09-9Sodium chlorate624-HourHealth<abbr title = "not applicable">N/A</abbr> 285 7758-19-2Sodium chlorite2024-HourHealth<abbr title = "not applicable">N/A</abbr> 286 143-33-9Sodium cyanide12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 287 1310-73-2Sodium hydroxide1024-HourCorrosion<abbr title = "not applicable">N/A</abbr> 288 7631-99-4Sodium nitrate7,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 289 7772-99-8Stannous chloride (as <abbr title = "Stannum">Sn</abbr>)1024-HourHealth<abbr title = "not applicable">N/A</abbr> 290 7440-24-6Strontium12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 291 1633-05-2Strontium carbonate12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 292 18480-07-4Strontium hydroxide12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 293 1314-11-0Strontium oxide12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 294 100-42-5Styrene40024-HourHealth<abbr title = "not applicable">N/A</abbr> 295 5329-14-6Sulfamic acid12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 296 7446-09-5Sulphur dioxide67 <abbr title = "parts per billion">ppb</abbr>10-MinuteHealth<abbr title = "Ambient Air Quality Criteria">AAQC</abbr> for implementation; where 1 <abbr title = "parts per billions">ppb</abbr> of sulphur dioxide is equal to 2.66 <abbr title = "micrograms per cubic metre">μg/m³</abbr> (at 20.0<abbr title = "degrees celsius">oC</abbr> and 1 atmosphere), rounded 296 7446-09-5Sulphur dioxide40 <abbr title = "parts per billion">ppb</abbr>1-HourHealthConverted from the 10-minute <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 1-hour air quality data for implementation; where 1 <abbr title = "parts per billion">ppb</abbr> of sulphur dioxide is equal to 2.66 <abbr title = "micrograms per cubic metre">μg/m³</abbr> (at 20.0<abbr title = "degress Celsius">oC</abbr> and 1 atmosphere), rounded 296 7446-09-5Sulphur dioxide4 <abbr title = "parts per billion">ppb</abbr>AnnualVegetation<abbr title = "Ambient Air Quality Criteria">AAQC</abbr> for implementation; where 1 <abbr title = "parts per billion">ppb</abbr> of sulphur dioxide is equal to 2.66 <abbr title = "micrograms per cubic metre">μg/m³</abbr> (at 20.0<abbr title = "degrees Celsius">oC</abbr> and 1 atmosphere), rounded 297 2551-62-4Sulphur hexafluoride600,00024-HourHealth<abbr title = "not applicable">N/A</abbr> 298 7664-93-9Sulphuric acid524-HourHealth<abbr title = "not applicable">N/A</abbr> 299 <abbr title = "not applicable">N/A</abbr>Suspended particulate matter60AnnualVisibilityAs the geometric mean of daily measurements over a year 299 <abbr title = "not applicable">N/A</abbr>Suspended particulate matter12024-HourVisibility<abbr title = "not applicable">N/A</abbr> 300 14807-96-6Talc - fibrous224-HourHealth<abbr title = "not applicable">N/A</abbr> 301 13494-80-9Tellurium (except hydrogen telluride)1024-HourHealth<abbr title = "not applicable">N/A</abbr> 302 4559-86-8Tetrabutylurea1024-HourHealth<abbr title = "not applicable">N/A</abbr> 303 109-99-9Tetrahydrofuran93,00024-HourOdourTo be updated 304 137-26-8Tetramethyl thiuram disulphide1024-HourHealth<abbr title = "not applicable">N/A</abbr> 305 62-56-6Thiourea2024-HourHealth<abbr title = "not applicable">N/A</abbr> 306 7440-31-5Tin1024-HourHealth<abbr title = "not applicable">N/A</abbr> 307 7440-32-6Titanium12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 308 13463-67-7Titanium dioxide3424-HourHealth<abbr title = "not applicable">N/A</abbr> 309 35711-34-3Tolmetin sodium524-HourHealth<abbr title = "not applicable">N/A</abbr> 310 108-88-3Toluene2,00024-HourOdourTo be updated 311 584-84-9Toluene di-isocyanate, 2,4-0.224-HourHealth<abbr title = "not applicable">N/A</abbr> 312 26471-62-5Toluene di-isocyanate, 2,4- and 2,6- (mixed isomers)0.224-HourHealth<abbr title = "not applicable">N/A</abbr> 313 <abbr title = "not applicable">N/A</abbr>Total reduced sulphur (<abbr>TRS</abbr>) compounds (for facilities that are part of the class identified by <abbr title = "North American Industry Classification System">NAICS</abbr> code 3221 (Pulp, Paper and Paperboard Mills))1424-HourHealthApplies to a mixture of reduced sulphur compounds, primarily dimethyl disulphide, dimethyl sulphide, hydrogen sulphide and mercaptans - calculated as the sum of the concentrations of the reduced sulphur compounds; if monitoring a specific reduced sulphur compound, then the <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> for that specific compound applies 313 <abbr title = "not applicable">N/A</abbr>Total reduced sulphur (<abbr>TRS</abbr>) compounds (for facilities that are part of the class identified by <abbr title = "North American Industry Classification System">NAICS</abbr> code 3221 (Pulp, Paper and Paperboard Mills))1310-minuteOdourSee <abbr title = "Total reduced sulphur">TRS</abbr> note above for 24-hour <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> 313 <abbr title = "not applicable">N/A</abbr>Total reduced sulphur (<abbr>TRS</abbr>) compounds (for other facilities)724-HourHealthSee <abbr title = "Total reduced sulphur">TRS</abbr> note above for 24-hour <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> for Pulp, Paper and Paperboard Mills 313 <abbr title = "not applicable">N/A</abbr>Total reduced sulphur (<abbr>TRS</abbr>) compounds (for other facilities)1310-minuteOdourSee <abbr title = "Total reduced sulphur">TRS</abbr> note above for 24-hour <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> for Pulp, Paper and Paperboard Mills 314 56-35-9Tributyltin oxide0.1424-HourHealth<abbr title = "not applicable">N/A</abbr> 315 120-82-1Trichlorobenzene, 1,2,4-40024-HourHealth<abbr title = "not applicable">N/A</abbr> 316 79-01-6Trichloroethylene (<abbr>TCE</abbr>)2.3AnnualHealth<abbr title = "not applicable">N/A</abbr> 316 79-01-6Trichloroethylene (<abbr>TCE</abbr>)1224-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 317 79-01-6Trichlorofluoromethane6,00024-HourHealthSee <abbr title = "Ontario Regulation">O. Reg.</abbr> 463/10 for Ozone Depleting Substances and Other Halocarbons for further restrictions on these, and several other ozone-depleting substances 318 76-05-1Trifluoroacetic acid1524-HourHealth<abbr title = "not applicable">N/A</abbr> 319 76-13-1Trifluorotrichloroethane800,00024-HourHealthSee <abbr title = "Ontario Regulation">O. Reg.</abbr> 463/10 for Ozone Depleting Substances and Other Halocarbons for further restrictions on these, and several other ozone-depleting substances 320 75-50-3Trimethyl amine0.51-HourOdourTo be updated 321 526-73-8Trimethylbenzene, 1,2,3- (individual isomer or Trimethylbenzene mixture)22024-HourHealth<abbr title = "not applicable">N/A</abbr> 322 95-63-6Trimethylbenzene, 1,2,4- (individual isomer or trimethylbenzene mixture)22024-HourHealth<abbr title = "not applicable">N/A</abbr> 323 108-67-8Trimethylbenzene, 1,3,5- (individual isomer or trimethylbenzene mixture)22024-HourHealth<abbr title = "not applicable">N/A</abbr> 324 77-99-6Trimethylol propane1,25024-HourHealth<abbr title = "not applicable">N/A</abbr> 325 <abbr title = "not applicable">N/A</abbr>Tripropyltin methacrylate124-HourHealth<abbr title = "not applicable">N/A</abbr> 326 7440-61-1Uranium and uranium compounds (<abbr title = "uranium">U</abbr> in <abbr title = "particulate matter">PM</abbr>₁₀)0.03AnnualHealth<abbr title = "not applicable">N/A</abbr> 326 7440-61-1Uranium and uranium compounds (<abbr title = "uranium">U</abbr> in <abbr title = "suspended particulate matter">SPM</abbr>)0.06AnnualHealth<abbr title = "not applicable">N/A</abbr> 326 7440-61-1Uranium and uranium compounds0.15 (as <abbr title = "particulate matter">PM</abbr>₁₀); 0.3 (as <abbr title = "suspended particulate matter">SPM</abbr>)24-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 327 7440-62-2Vanadium224-HourHealth<abbr title = "not applicable">N/A</abbr> 328 75-01-4Vinyl chloride0.2AnnualHealth<abbr title = "not applicable">N/A</abbr> 329 75-01-4Vinyl chloride124-HourHealthConverted from the annual <abbr title = "Ambient Air Quality Criteria">AAQC</abbr> to allow assessment of 24-hour air quality data 330 75-35-4Vinylidene chloride (1,1- Dichloroethene)1024-HourHealth<abbr title = "not applicable">N/A</abbr> 331 81-81-2Warfarin1024-HourHealth<abbr title = "not applicable">N/A</abbr> 332 1330-20-7Xylenes73024-HourHealthApplies to the following isomers, individually or as a mixture: o-Xylene (<abbr title="Chemical Abstracts Service Registry Number">CASRN</abbr> 95-47-6), p-Xylene (<abbr title="Chemical Abstracts Service Registry Number">CASRN</abbr> 106-42-3), and m-Xylene (<abbr title="Chemical Abstracts Service Registry Number">CASRN</abbr> 108-38-3) 332 1330-20-7Xylenes3,00010-minuteOdourApplies to the following isomers, individually or as a mixture: o-Xylene (<abbr title="Chemical Abstracts Service Registry Number">CASRN</abbr> 95-47-6), p-Xylene (<abbr title="Chemical Abstracts Service Registry Number">CASRN</abbr> 106-42-3), and m-Xylene (<abbr title="Chemical Abstracts Service Registry Number">CASRN</abbr> 108-38-3) 333 7440-66-6Zinc12024-HourParticulate<abbr title = "not applicable">N/A</abbr> 334 7646-85-7Zinc chloride101-HourHealth<abbr title = "not applicable">N/A</abbr> 335 557-05-1Zinc stearate3524-HourHealth<abbr title = "not applicable">N/A</abbr>