Pollutant Summary
Total Reported Releases and Transfers to Sewage and Treatment across Canada by Year

Please Note:
  • This table represents all the chemicals reported under NPRI. These are divided into core chemicals and supplementary chemicals .
  • The units of measurement for chemical data presented below are in kilograms (kg), excluding hexachlorobenzene which is measured in grams (g) and dioxins/furans which are measured in grams (g) TEQ.
  • Some increases or decreases may be the result of reporting changes.
  • For more information about reporting changes, see How Time Trends Are Analyzed.
  • Please note that RECYCLING and ENERGY RECOVERY DATA are NOT included in the figures below. Beginning in 1998, reporting on recycling data and energy recovery became mandatory. To query recycling data, please go to Who is Polluting?
  • To determine the health effects associated to specific chemicals listed in the matrix, please see the Health Effects Summary
The chemical matrix is divided by Core Chemicals and Supplementary Chemicals
Chemical CAS Number 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
Core Chemicals
Supplementary Chemicals 1-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y
1,1,2,2-Tetrachloroethane 79-34-5 0 0 571 1,566 468 71,150 171 39,234 314 1,382 0
1,1,2-Trichloroethane 79-00-5 20 4,370 15,849 16,538 9,815 164,204 9,552 90,072 24,424 634 0
1,2,4-Trichlorobenzene 120-82-1 0 0 0 13,205 0 0 0 2,221 814 3,006 0
1,2,4-Trimethylbenzene 95-63-6 510,688 395,923 797,595 750,755 746,860 681,017 787,978 1,064,144 871,550 967,028 0
1,2-Butylene oxide 106-88-7 0 0 0 0 0 204 88 0 0 0 0
1,2-Dichloroethane 107-06-2 6,219 17,476 21,712 27,138 33,653 73,346 23,191 40,269 10,440 11,466 0
1,2-Dichloropropane 78-87-5 0 0 1,096 0 0 0 0 0 0 0 0
1,3-Butadiene 106-99-0 285,881 133,414 124,326 110,475 103,945 126,073 106,988 97,468 87,123 104,175 0
1,4-Dioxane 123-91-1 8,005 6,395 4,289 3,036 1,774 799 764 791 760 1,019 0
2,4-Diaminotoluene (and its salts) 95-80-7 0 0 0 0 0 0 0 0 0 0 0
2,4-Dichlorophenol (and its salts) 120-83-2 0 0 0 0 0 1 0 0 0 0 0
2,4-Dinitrotoluene 121-14-2 700 2,350 816 196 1,190 100 200 100 0 8,880 0
2,6-Dinitrotoluene 606-20-2 0 0 0 0 0 0 0 0 0 0 0
2-Ethoxyethanol 110-80-5 9,656 8,644 9,739 17,078 24,063 20,183 10,500 1,490 0 0 0
2-Ethoxyethyl acetate 111-15-9 4,735 472 34,894 4,861 4,364 181 144 130 2,804 4,489 0
2-Methoxyethanol 109-86-4 40,200 3 10,372 16,924 8,151 11,557 9,456 9,391 113 3 0
2-Methoxyethyl acetate 110-49-6 0 0 0 0 0 0 0 0 0 0 0
2-Nitropropane 79-46-9 125 125 0 0 0 0 0 0 0 0 0
4,6-Dinitro-o-cresol (and its salts) 534-52-1 32 2,000 360 680 21 250 12 1,501 0 0 0
Acetaldehyde 75-07-0 465,603 525,386 440,692 307,987 867,920 954,628 1,095,742 954,860 1,119,308 1,418,585 0
Acetonitrile 75-05-8 79,055 134,400 141,182 249,167 46,300 44,589 7,037 8,183 6,490 113,764 0
Acrylamide 79-06-1 800 847 3,367 724 488 245 287 275 298 224 0
Acrylic acid (and its salts) 79-10-7 903 328 402 552 15,476 698 521 378 1,621 1,179 0
Acrylonitrile 107-13-1 50,921 28,308 6,469 6,205 70,720 7,778 73,841 113,938 121,360 15,264 0
Allyl alcohol 107-18-6 0 0 0 0 0 0 0 0 0 0 0
Allyl chloride 107-05-1 0 0 0 0 0 0 0 0 0 0 0
Aluminum (fume or dust) 7429-90-5 812,793 804,804 868,157 1,109,274 1,416,899 1,028,958 467,367 898,531 1,682,795 1,568,976 0
Aluminum oxide (fibrous forms) 1344-28-1 58,404 154,173 329,159 399,527 700,516 104,842 822,538 30,562 378,740 861,659 0
Ammonia (Total) NA - 16 31,184,013 33,984,467 41,806,786 38,415,501 38,872,916 54,655,481 55,538,251 83,313,280 84,987,914 82,758,387 0
Aniline (and its salts) 62-53-3 2,960 3,224 3,745 2,913 2,627 2,960 3,110 2,332 2,531 2,501 0
Anthracene 120-12-7 2,852 27,264 18,212 2,925 12,422 11,161 19,089 12,113 9,312 5,717 0
Antimony (and its compounds) NA - 01 36,587 24,669 32,958 49,125 26,180 68,509 81,075 63,290 59,417 79,158 0
Asbestos (friable form) 1332-21-4 4,873,926 1,895,589 4,718,070 5,303,430 3,300,943 4,790,061 2,548,415 1,952,019 9,181,246 9,958,822 0
Benzene 71-43-2 2,386,334 2,349,495 1,992,352 1,766,107 1,618,662 1,425,496 1,278,154 1,270,887 1,313,772 1,155,283 0
Benzoyl chloride 98-88-4 0 0 0 0 0 0 0 0 0 0 0
Benzoyl peroxide 94-36-0 0 100 100 100 100 100 600 616 403 349 0
Benzyl chloride 100-44-7 10 142 140 138 105 65 213 47,442 14,784 5,401 0
Biphenyl 92-52-4 16,134 16,463 17,242 25,522 16,732 36,594 32,355 14,517 37,175 14,755 0
Bis(2-ethylhexyl) adipate 103-23-1 18,937 6,322 19,307 18,249 59,923 47,588 37,228 14,064 38,741 116,849 0
Bis(2-ethylhexyl) phthalate 117-81-7 96,564 71,603 65,720 62,487 81,249 86,422 66,753 60,376 107,125 55,982 0
Bromomethane 74-83-9 10,698 13,988 9,507 6,304 0 0 1 55 55 14,308 0
Butyl acrylate 141-32-2 1,666 4,496 3,182 8,556 1,672 1,902 2,967 5,501 3,794 5,380 0
Butyl benzyl phthalate 85-68-7 25,399 30,092 33,275 17,191 21,067 28,339 46,572 52,939 21,093 41,907 0
Butyraldehyde 123-72-8 0 20 17 16 28 31 29 39 0 0 0
C.I. Acid Green 3 4680-78-8 0 125 0 0 0 0 0 0 0 0 0
C.I. Basic Green 4 569-64-2 0 0 0 0 0 0 0 0 4 3 0
C.I. Basic Red 1 989-38-8 0 0 0 0 0 0 0 0 0 0 0
C.I. Disperse Yellow 3 2832-40-8 0 0 0 0 0 0 0 0 0 0 0
C.I. Food Red 15 81-88-9 0 0 0 0 0 0 0 0 1 1 0
C.I. Solvent Orange 7 3118-97-6 0 0 0 0 0 0 0 0 0 0 0
C.I. Solvent Yellow 14 842-07-9 0 0 0 0 0 0 0 0 0 0 0
Calcium cyanamide 156-62-7 0 0 0 0 0 0 0 0 0 0 0
Carbon disulphide 75-15-0 2,106,397 2,475,149 3,136,807 2,244,114 2,875,736 3,164,929 4,065,810 5,021,893 3,791,846 3,822,405 0
Carbon tetrachloride 56-23-5 21,370 21,874 28,782 22,504 13,168 15,327 20,243 27,910 5,689 18,242 0
Catechol 120-80-9 0 0 0 0 0 0 5 0 150 0 0
Chlorine 7782-50-5 1,653,040 1,284,478 1,335,038 689,645 746,271 992,697 773,513 916,877 770,919 626,671 0
Chlorine dioxide 10049-04-4 990,222 1,139,537 1,176,902 825,525 952,124 726,737 630,828 535,473 518,759 538,431 0
Chloroacetic acid (and its salts) 79-11-8 0 0 0 0 0 0 102 100 100 100 0
Chlorobenzene 108-90-7 12 0 5 3,617 97,593 24,644 48 4,662 9,522 5,556 0
Chloroethane 75-00-3 183,540 170,454 164,717 185,354 221,057 242,114 139,354 317 1,382 320 0
Chloroform 67-66-3 216,190 245,978 288,190 268,014 152,655 45,123 108,859 120,778 87,245 69,705 0
Chloromethane 74-87-3 970,846 648,505 440,686 385,342 371,058 495,340 749,029 759,747 652,497 296,957 0
Cobalt (and its compounds) NA - 05 38,592 46,094 63,677 103,955 79,732 102,876 103,519 99,404 103,762 166,324 0
Copper (and its compounds) NA - 06 15,069,488 1,850,323 2,801,740 2,663,757 2,706,965 2,292,105 2,518,227 2,813,353 3,450,977 18,940,336 0
Cumene 98-82-8 24,960 19,013 29,075 34,282 28,817 17,973 18,427 20,329 20,554 42,776 0
Cumene hydroperoxide 80-15-9 21 15 15 21 28 27 22 47 7 6 0
Cyanides (ionic) NA - 07 72,790 24,913 9,427 11,215 13,875 10,226 5,387 18,512 7,256 8,383 0
Cyclohexane 110-82-7 3,129,177 3,380,229 3,787,736 2,858,289 1,850,447 1,701,479 1,685,350 1,282,666 1,192,023 1,209,470 0
Decabromodiphenyl oxide 1163-19-5 110 101 702 492 2,308 3,840 13,521 4,025 5,773 3,724 0
Di-n-octyl phthalate 117-84-0 4,724 21,109 20,412 44,935 26,730 21,656 956 873 828 992 0
Dibutyl phthalate 84-74-2 12,543 3,768 2,610 3,672 3,910 3,450 6,919 10,000 8,338 9,803 0
Dichloromethane 75-09-2 2,386,509 2,448,189 2,754,100 2,471,534 2,603,646 2,414,671 1,992,347 1,237,817 804,280 779,648 0
Diethyl sulphate 64-67-5 0 0 0 0 0 0 0 0 0 0 0
Dimethyl phthalate 131-11-3 0 35,001 18,500 3,220 10 30 32 111 30 20 0
Dimethyl sulphate 77-78-1 8 11 10 13 13 4 0 0 0 0 0
Dinitrotoluene (mixed isomers) 25321-14-6 0 0 0 0 0 0 0 0 111 106 0
Epichlorohydrin 106-89-8 133 127 7 28 7 595 595 602 2 0 0
Ethyl acrylate 140-88-5 1,090 440 1,241 196 322 16,484 10,928 160 114 116 0
Ethyl chloroformate 541-41-3 0 102 0 0 0 0 0 0 0 0 0
Ethylbenzene 100-41-4 721,622 739,666 954,123 1,005,502 1,066,383 901,768 936,857 1,228,665 1,100,555 1,124,452 0
Ethylene 74-85-1 2,392,649 2,311,829 2,057,828 2,684,687 2,289,234 2,711,022 2,471,098 2,056,883 1,965,444 1,880,595 0
Ethylene glycol 107-21-1 7,405,800 7,540,049 8,565,879 5,859,886 5,405,103 6,960,376 7,953,837 7,556,607 7,975,267 6,897,690 0
Ethylene oxide 75-21-8 26,204 23,094 18,449 19,799 22,359 20,417 30,525 26,471 13,301 15,045 0
Ethylene thiourea 96-45-7 0 0 0 0 0 0 0 2,340 3,175 2,177 0
Formaldehyde 50-00-0 1,294,567 1,440,603 1,547,786 1,562,567 1,991,031 2,186,629 2,055,512 2,211,277 2,344,673 2,239,125 0
Hexachlorocyclopentadiene 77-47-4 0 0 0 0 0 0 0 0 0 0 0
Hexachloroethane 67-72-1 0 0 227 0 19,467 7,101 7 3,919 33 1 0
Hydrazine (and its salts) 302-01-2 1,583 2,365 2,898 2,285 3,714 1,412 2,086 5,648 5,853 4,382 0
Hydrochloric acid 7647-01-0 6,135,886 8,016,579 14,597,480 16,583,936 16,251,515 20,627,375 22,101,049 18,034,107 17,117,340 17,477,703 0
Hydrogen cyanide 74-90-8 290 109,117 20,890 12,340 58,890 33,792 19,906 38,913 28,392 35,028 0
Hydrogen fluoride 7664-39-3 1,788,599 1,993,035 3,141,415 3,405,402 3,561,369 3,602,120 3,259,078 3,623,214 3,286,142 3,592,837 0
Hydroquinone (and its salts) 123-31-9 10 140 266 1 701 1 2 1 3 170 0
i-Butyl alcohol 78-83-1 170,250 163,880 131,327 217,039 188,100 263,497 286,777 435,212 348,991 369,379 0
Isobutyraldehyde 78-84-2 0 0 0 0 0 0 0 0 0 0 0
Isopropyl alcohol 67-63-0 3,030,056 3,379,838 3,389,593 3,560,650 3,479,386 2,947,490 3,134,815 4,370,011 3,989,336 4,007,253 0
Isosafrole 120-58-1 0 0 0 0 0 0 0 0 0 0 0
Maleic anhydride 108-31-6 16,930 1,064 3,880 962 1,724 1,136 1,214 1,201 1,116 8,221 0
Manganese (and its compounds) NA - 09 6,987,739 9,748,325 11,832,482 10,529,066 11,080,500 10,827,464 10,391,405 11,768,754 12,818,106 44,192,237 0
Methanol 67-56-1 33,270,532 27,426,779 26,720,644 26,484,180 32,048,972 29,861,013 30,512,008 31,772,911 35,913,378 35,046,099 0
Methyl acrylate 96-33-3 5,876 5,003 3,384 5,441 4,876 38 126 143 91 3 0
Methyl ethyl ketone 78-93-3 5,450,652 6,624,889 6,851,096 6,403,234 7,421,589 7,466,585 5,919,911 5,925,292 4,177,786 4,034,534 0
Methyl iodide 74-88-4 0 0 0 0 0 0 0 0 0 0 0
Methyl isobutyl ketone 108-10-1 793,656 840,698 1,026,685 979,934 1,040,537 1,040,998 1,096,280 1,213,353 846,546 902,370 0
Methyl methacrylate 80-62-6 105,713 93,017 91,416 110,064 87,454 19,227 36,468 36,147 52,421 63,682 0
Methyl tert-butyl ether 1634-04-4 121,947 145,944 162,454 115,046 122,559 171,351 130,206 108,040 147,137 151,742 0
Methylenebis(phenylisocyanate) 101-68-8 24,981 51,794 56,555 60,498 54,748 124,672 171,044 225,010 127,812 81,732 0
Michler's ketone (and its salts) 90-94-8 0 0 0 0 0 0 0 0 0 0 0
Molybdenum trioxide 1313-27-5 13,566 20,753 32,389 39,177 73,087 66,754 132,974 46,039 26,895 20,907 0
N,N-Dimethylaniline (and its salts) 121-69-7 0 0 0 0 0 0 0 0 0 0 0
n-Butyl alcohol 71-36-3 1,530,291 1,502,816 1,620,252 1,699,098 1,658,731 1,675,419 1,408,592 1,855,293 1,505,103 1,283,883 0
N-Nitrosodiphenylamine 86-30-6 0 0 0 0 0 0 0 0 0 0 0
Naphthalene 91-20-3 69,074 93,557 90,957 173,797 194,962 173,401 142,106 318,075 146,528 237,659 0
Nickel (and its compounds) NA - 11 1,203,792 1,127,869 1,503,116 1,342,976 1,352,874 1,951,263 2,078,428 1,584,375 1,636,831 5,667,153 0
Nitrate ion in solution at pH >= 6.0 NA - 17 6,754,981 8,884,300 10,966,850 9,572,059 12,104,008 26,613,018 30,435,295 39,122,230 49,182,934 58,326,920 0
Nitric acid 7697-37-2 294,905 237,874 217,291 317,458 960,582 1,361,970 1,329,834 2,903,392 5,008,584 3,441,166 0
Nitrilotriacetic acid (and its salts) 139-13-9 2,660 2,205 5,770 3,635 5,351 20,410 15,468 4,226 8,574 7,982 0
Nitrobenzene 98-95-3 0 0 0 0 0 0 0 0 0 0 0
Nitroglycerin 55-63-0 9,000 3,820 0 0 0 0 0 0 9,280 7,880 0
o-Dichlorobenzene 95-50-1 8,400 20,511 10,500 10,500 16,897 12,637 8,868 10,743 39,485 28,244 0
o-Phenylphenol (and its salts) 90-43-7 0 0 0 0 0 0 0 3 0 0 0
p,p'-Isopropylidenediphenol 80-05-7 1,143 1,290 2,083 2,419 1,830 6,647 7,823 5,587 22,723 12,977 0
p,p'-Methylenebis(2-chloroaniline) 101-14-4 4 5 6 5 5 5 5 5 4 4 0
p,p'-Methylenedianiline 101-77-9 100 0 0 0 0 0 0 0 13 0 0
p-Dichlorobenzene 106-46-7 10,264 9,600 8,500 9,140 11,687 25,800 13,041 11,278 27,778 30,962 0
p-Nitrophenol (and its salts) 100-02-7 0 0 0 0 0 0 0 0 0 0 0
p-Phenylenediamine (and its salts) 106-50-3 0 0 0 1,890 505 2,365 1,828 11 937 1,632 0
p-Quinone 106-51-4 0 0 0 0 0 0 0 0 0 0 0
Peracetic acid (and its salts) 79-21-0 0 0 0 0 0 0 0 0 0 0 0
Phenol (and its salts) 108-95-2 553,007 946,741 613,865 737,485 619,406 688,004 867,697 859,048 1,076,833 1,107,238 0
Phosgene 75-44-5 14 20 30 2 1 1 0 0 37,832 42,010 0
Phosphorus (yellow or white) 7723-14-0 60,094 20,982 34,484 83,649 45,764 46,624 20,743 14,754 108,567 93,972 0
Phthalic anhydride 85-44-9 11,690 2,997 13,296 6,977 353,038 828,434 411,107 611,849 1,959 546 0
Propionaldehyde 123-38-6 0 0 2 0 0 0 14,479 67 596 26,513 0
Propylene 115-07-1 1,364,450 1,117,131 1,102,482 951,300 962,026 885,714 1,022,085 979,310 1,157,020 1,035,317 0
Propylene oxide 75-56-9 10,469 11,448 13,005 14,182 10,403 10,480 5,856 5,164 1,265 517 0
Pyridine (and its salts) 110-86-1 0 0 0 387 391 161 15,662 25,310 12,801 3 0
Quinoline (and its salts) 91-22-5 0 0 0 0 3,000 1,110 750 928 726 1,667 0
Safrole 94-59-7 0 0 0 0 0 0 0 0 0 0 0
sec-Butyl alcohol 78-92-2 17,099 20,326 130 123 7,320 6,598 4,947 1,630 1,187 1,254 0
Selenium (and its compounds) NA - 12 42,479 44,767 45,509 55,653 69,120 62,968 1,026,851 155,723 148,699 145,645 0
Silver (and its compounds) NA - 13 2,359 4,044 3,932 35,999 41,274 3,035 4,365 4,186 34,447