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Highest On-site Substance Releases, by Quantity

Releases to air

Releases to water bodies

Releases to land

Releases to air
Year CAS Number Substance Total - Releases to Air
(tonnes)
Facility count View Details
2017 630-08-0 Carbon monoxide 928,977 2,576 View results for Carbon monoxide for year 2017
2017 7446-09-5 Sulphur dioxide 875,365 712 View results for Sulphur dioxide for year 2017
2017 11104-93-1 Nitrogen oxides (expressed as nitrogen dioxide) 589,964 2,922 View results for Nitrogen oxides (expressed as nitrogen dioxide) for year 2017
2017 NA - M08 Total particulate matter 403,710 1,230 View results for Total particulate matter for year 2017
2017 NA - M16 Volatile organic compounds 195,881 1,765 View results for Volatile organic compounds for year 2017
2017 NA - 16 Ammonia (total) 17,415 432 View results for Ammonia (total) for year 2017
2017 7647-01-0 Hydrochloric acid 11,857 179 View results for Hydrochloric acid for year 2017
2017 67-56-1 Methanol 11,447 345 View results for Methanol for year 2017
2017 NA - M14 Total reduced sulphur (expressed as hydrogen sulphide) 5,687 150 View results for Total reduced sulphur (expressed as hydrogen sulphide) for year 2017
2017 110-54-3 n-Hexane 4,322 314 View results for n-Hexane for year 2017
2016 7446-09-5 Sulphur dioxide 976,090 717 View results for Sulphur dioxide for year 2016
2016 630-08-0 Carbon monoxide 869,758 2,583 View results for Carbon monoxide for year 2016
2016 11104-93-1 Nitrogen oxides (expressed as nitrogen dioxide) 586,342 2,998 View results for Nitrogen oxides (expressed as nitrogen dioxide) for year 2016
2016 NA - M08 Total particulate matter 328,916 1,250 View results for Total particulate matter for year 2016
2016 NA - M16 Volatile organic compounds 188,027 1,755 View results for Volatile organic compounds for year 2016
2016 NA - 16 Ammonia (total) 18,493 438 View results for Ammonia (total) for year 2016
2016 7647-01-0 Hydrochloric acid 12,604 184 View results for Hydrochloric acid for year 2016
2016 67-56-1 Methanol 11,818 356 View results for Methanol for year 2016
2016 NA - M14 Total reduced sulphur (expressed as hydrogen sulphide) 6,275 162 View results for Total reduced sulphur (expressed as hydrogen sulphide) for year 2016
2016 110-54-3 n-Hexane 4,163 304 View results for n-Hexane for year 2016
2015 7446-09-5 Sulphur dioxide 987,109 779 View results for Sulphur dioxide for year 2015
2015 630-08-0 Carbon monoxide 845,002 2,626 View results for Carbon monoxide for year 2015
2015 11104-93-1 Nitrogen oxides (expressed as nitrogen dioxide) 610,150 3,108 View results for Nitrogen oxides (expressed as nitrogen dioxide) for year 2015
2015 NA - M08 Total particulate matter 341,940 1,227 View results for Total particulate matter for year 2015
2015 NA - M16 Volatile organic compounds 203,706 1,775 View results for Volatile organic compounds for year 2015
2015 NA - 16 Ammonia (total) 17,750 442 View results for Ammonia (total) for year 2015
2015 7647-01-0 Hydrochloric acid 12,653 185 View results for Hydrochloric acid for year 2015
2015 67-56-1 Methanol 11,977 368 View results for Methanol for year 2015
2015 NA - M14 Total reduced sulphur (expressed as hydrogen sulphide) 5,916 153 View results for Total reduced sulphur (expressed as hydrogen sulphide) for year 2015
2015 110-54-3 n-Hexane 4,569 322 View results for n-Hexane for year 2015
2014 7446-09-5 Sulphur dioxide 1,029,822 745 View results for Sulphur dioxide for year 2014
2014 630-08-0 Carbon monoxide 872,380 2,759 View results for Carbon monoxide for year 2014
2014 11104-93-1 Nitrogen oxides (expressed as nitrogen dioxide) 629,011 3,291 View results for Nitrogen oxides (expressed as nitrogen dioxide) for year 2014
2014 NA - M08 Total particulate matter 334,066 1,156 View results for Total particulate matter for year 2014
2014 NA - M16 Volatile organic compounds 214,281 1,785 View results for Volatile organic compounds for year 2014
2014 NA - 16 Ammonia (total) 18,566 443 View results for Ammonia (total) for year 2014
2014 7647-01-0 Hydrochloric acid 13,607 189 View results for Hydrochloric acid for year 2014
2014 67-56-1 Methanol 11,815 384 View results for Methanol for year 2014
2014 NA - M14 Total reduced sulphur (expressed as hydrogen sulphide) 6,980 157 View results for Total reduced sulphur (expressed as hydrogen sulphide) for year 2014
2014 110-54-3 n-Hexane 4,697 318 View results for n-Hexane for year 2014
2013 7446-09-5 Sulphur dioxide 1,081,670 793 View results for Sulphur dioxide for year 2013
2013 630-08-0 Carbon monoxide 953,235 2,902 View results for Carbon monoxide for year 2013
2013 11104-93-1 Nitrogen oxides (expressed as nitrogen dioxide) 630,534 3,412 View results for Nitrogen oxides (expressed as nitrogen dioxide) for year 2013
2013 NA - M08 Total particulate matter 328,685 1,156 View results for Total particulate matter for year 2013
2013 NA - M16 Volatile organic compounds 225,074 1,778 View results for Volatile organic compounds for year 2013
2013 NA - 16 Ammonia (total) 18,430 455 View results for Ammonia (total) for year 2013
2013 67-56-1 Methanol 12,728 380 View results for Methanol for year 2013
2013 7647-01-0 Hydrochloric acid 11,355 194 View results for Hydrochloric acid for year 2013
2013 NA - M14 Total reduced sulphur (expressed as hydrogen sulphide) 7,615 164 View results for Total reduced sulphur (expressed as hydrogen sulphide) for year 2013
2013 7664-93-9 Sulphuric acid 7,144 201 View results for Sulphuric acid for year 2013

Notes:

  1. Data as of: September 13, 2018
  2. PM-2.5 and PM-10 fractions are omitted from results to avoid double counting with PM-Total.
  3. H2S, CS2 and COS are excluded from on-site release totals for air to avoid double counting with TRS. TRS is excluded from on-site release totals for land and water to avoid double counting with H2S, CS2 and COS.
  4. The number of results returned here may differ from published lists of the number of facilities reporting pollutant releases and transfers to the NPRI due to the exclusion of facilities reporting only under Ontario Regulation 127/01, and/or facilities submitting “did not meet criteria” reports, “Facility closure” and “ownership change” notifications.

Additional Resources:

For additional resources for accessing, understanding and analyzing NPRI data visit: Pollution Data and Reports Web page.

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