Canada’s Air Pollutant Emissions Inventory Report 2019: chapter 2

2.7  Lead (Pb)

In 2017, approximately 181 tonnes (t) of Pb were emitted in Canada (Table 2-9). Ore and mineral industries were the largest contributor at 77% (139 t) of emissions, with the non-ferrous refining and smelting industry accounting for the largest share at 72% (131 t) of total Pb emissions. Transportation and mobile equipment was the second largest contributor at 18% (33 t) of total emissions (almost all of which was from air transportation).

Overall, lead emissions decreased by 86% (1.1 kt) from 1990 to 2017 (Figure 2-7). This decreasing trend is partly attributable to the closure of outdated smelters and partly to the implementation, since 2006, of regulated pollution prevention plans. (ECCC, 2015 Progress Report: Pollution Prevention Planning by Base Metals Smelters and Refineries and Zinc Plants, 2017). However,since 2013 lead emissions attributed to the non-ferrous refining and smelting industry have slowly increased. Reductions in emissions from mining and rock quarrying from 1990 to 1998 also influenced the overall trend, as well as emission reductions in air transportation across the time series.

The most significant changes in Pb emissions from 1990 to 2017 include:

  • ore and mineral industries: decrease of 88% (1.0 kt), of which:
    • non-ferrous refining and smelting industry: decrease of 85% (756 t)
    • mining and rock quarrying: decrease of 99% (197 t)
  • transportation and mobile equipment: decrease of 59% (46 t), of which:
    •  air transportation: decrease of 59% (46 t)

Figure 2-7: Major contributors to national Pb trends

Figure 2-7 (See long description below)
Long description for Figure 2-7

Figure 2-7 is a stacked area graph displaying the five major contributors to National Pb trends. The five contributors are the following: Non-Ferrous Refining and Smelting Industry, Iron and Steel Industry, Mining and Rock Quarrying, Air Transportation and Other. The following table displays the contributions (t) for the years 1990 to 2017.

Figure 2-7: Major contributors to national Pb trends (t)
Sector 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
Sector 1 - Non-Ferrous Refining and Smelting Industry 890 850 900 470 500 620 700 530 450 440 440 370 330 230 180 130 170 170 160 160 130 100 88 75 85 110 110 130
Sector 2 - Air Transportation 78 59 53 53 52 59 57 54 55 51 51 50 49 45 41 47 42 44 43 41 37 30 37 31 28 31 33 32
Sector 3 - Iron and Steel Industry 54 54 54 80 82 71 74 60 54 16 8.0 18 17 27 25 5.7 5.9 6.6 6.0 4.5 6.3 6.1 6.7 5.2 6.1 5.5 5.2 5.1
Sector 4 - Mining and Rock Quarrying 200 210 200 190 170 130 150 52 18 28 0 0 54 68 68 65 66 57 44 31 20 10 7.1 3.2 0.90 0.98 1.1 1.2
Sector 5 - Other 72 72 70 100 110 58 48 43 41 46 45 94 46 48 39 30 29 29 28 23 24 23 16 14 16 14 15 12

Table 2-9:  National summary of annual Pb emissions

Ore and mineral industries (kg)
Sector 1990 2000 2005 2012 2013 2014 2015 2016 2017
Sub-total 1 100 000 460 000 210 000 100 000 85 000 94 000 120 000 120 000 140 000
Aluminium industry 84 84 no emissions (-) - - - - - -
Asphalt paving industry 1 400 1 200 1 200 990 980 1 000 1 100 1 000 1 000
Cement and concrete industry 550 610 960 620 530 600 870 700 570
Foundries 2 000 6 600 1 600 430 210 190 210 200 170
Iron and steel industry 54 000 8 000 5 700 6 700 5 200 6 100 5 500 5 200 5 100
Iron ore industry - - - 75 77 48 3.9 4.0 5.3
Mineral products industry - - 0.19 - - - - 15 -
Mining and rock quarrying 200 000 260 65 000 7 100 3 100 900 980 1 100 1 200
Non-ferrous mining and smelting industry 890 000 440 000 130 000 88 000 75 000 85 000 110 000 110 000 130 000
Oil and gas industry (kg)
Sector 1990 2000 2005 2012 2013 2014 2015 2016 2017
Sub-total 340 300 720 990 1 100 670 510 580 520
Downstream oil and gas industry 200 81 450 320 380 300 320 380 350
Upstream oil and gas industry 140 220 260 660 700 370 190 200 160
Electric power generation (utilities) (kg)
Sector 1990 2000 2005 2012 2013 2014 2015 2016 2017
Sub-total 11 000 14 000 1 900 2 600 1 400 1 800 1 500 1 400 1 700
Coal 8 300 10 000 1 300 2 100 860 1 200 820 770 1 100
Diesel no emissions (-) - - - - - - - -
Natural gas 430 530 72 89 85 93 97 86 91
Waste materials - 0.03 6.6 1.6 0.27 0.38 2.9 2.8 4.7
Other (electric power generation) 2 600 3 200 590 320 430 490 530 560 540
Manufacturing (kg)
Sector 1990 2000 2005 2012 2013 2014 2015 2016 2017
Sub-total 48 000 16 000 17 000 4 700 4 600 6 400 5 900 6 500 3 700
Abrasives manufacture no emissions (-) - - - - - - - -
Bakeries - - - - - - - - -
Biofuel production - - - - - - - - -
Chemicals industry 12 000 300 1 800 72 85 82 120 45 45
Electronics 2 000 710 96 24 20 18 17 19 22
Food preparation - - - - - - - - -
Glass manufacturing 21 6.0 25 0.34 0.30 0.00 0.00 0.00 -
Grain industry - - - - - - - - -
Metal fabrication 28 000 9 200 10 000 2 300 2 100 3 600 1 900 3 200 1 800
Plastics manufacturing 76 46 21 23 0.01 4.7 4.8 4.8 1.3
Pulp and paper industry 2 100 840 2 400 1 300 1 400 2 200 3 400 2 800 1 300
Textiles - - 0.01 0.00 - - - - -
Vehicle manufacture (engines, parts, assembly, painting) 950 2 400 770 61 65 68 68 66 69
Wood products 3 500 2 500 1 400 860 820 520 320 320 390
Other (manufacturing) - 220 150 15 32 32 25 39 9.3
Transportation and mobile equipment (kg)
Sector 1990 2000 2005 2012 2013 2014 2015 2016 2017
Sub-total 79 000 52 000 48 000 38 000 33 000 29 000 32 000 33 000 33 000
Air transportation 78 000 51 000 47 000 37 000 31 000 28 000 31 000 33 000 32 000
Heavy-duty diesel vehicles no emissions (-) - - - - - - - -
Heavy-duty gasoline vehicles - - - - - - - - -
Heavy-duty LPG/NG vehicles - - - - - - - - -
Light-duty diesel trucks - - - - - - - - -
Light-duty diesel vehicles - - - - - - - - -
Light-duty gasoline trucks - - - - - - - - -
Light-duty gasoline vehicles - - - - - - - - -
Light-duty LPG/NG trucks - - - - - - - - -
Light-duty LPG/NG vehicles - - - - - - - - -
Marine transportation 600 740 830 930 1 100 1 200 560 570 590
Motorcycles - - - - - - - - -
Off-road diesel vehicles and equipment - - - - - - - - -
Off-road gasoline/LPG/NG vehicles and equipment - - - - - - - - -
Rail transportation 310 290 290 240 210 200 170 160 160
Tire wear and brake lining - - - - - - - - -
Agriculture (kg)
Sector 1990 2000 2005 2012 2013 2014 2015 2016 2017
Sub-total 30 30 26 74 76 84 70 68 66
Animal production no emissions (-) - - - - - - - -
Crop production - - - - - - - - -
Fuel use 30 30 26 74 76 84 70 68 66
Commercial / residential / institutional (kg)
Sector 1990 2000 2005 2012 2013 2014 2015 2016 2017
Sub-total 6 300 4 800 4 600 4 000 3 500 3 200 3 200 3 200 3 200
Cigarette smoking 2.3 1.9 1.5 1.3 1.1 1.2 1.0 1.0 1.1
Commercial and institutional fuel combustion 250 290 420 1 000 510 230 250 240 250
Commercial cooking no emissions (-) - - - - - - - -
Construction fuel combustion 10 4.9 11 8.5 7.5 7.3 7.7 6.7 6.6
Home firewood burning 3 500 3 200 2 600 2 700 2 700 2 600 2 600 2 600 2 600
Human - - - - - - - - -
Marine cargo handling 2 000 970 1 200 3 59 20 10 41 51
Residential fuel combustion 490 410 390 310 290 300 280 250 240
Service stations - - - - - - - - -
Other (commercial / residential / institutional) - - - - - - - - -
Incineration and waste (kg)
Sector 1990 2000 2005 2012 2013 2014 2015 2016 2017
Sub-total 330 390 570 590 420 440 420 400 400
Crematoriums 2.0 2.8 3.6 4.4 4.7 5.2 5.3 5.4 5.6
Waste incineration 330 390 530 390 390 410 390 380 380
Waste treatment and disposal no emissions (-) 0.00 39 200 24 27 23 15 16
Paints and solvents (kg)
Sector 1990 2000 2005 2012 2013 2014 2015 2016 2017
Sub-total 4.3 6.3 no emissions (-) - 0.06 0.00 - - -
Dry cleaning - - - - - - - - -
General solvent use - - - - - - - - -
Printing 4.3 6.3 - - - - - - -
Surface coatings - - - - 0.06 0.00 - - -
Dust (kg)
Sector 1990 2000 2005 2012 2013 2014 2015 2016 2017
Sub-total no emissions (-) - - - - - - - -
Coal transportation - - - - - - - - -
Construction operations - - - - - - - - -
Mine tailings - - - - - - - - -
Paved roads - - - - - - - - -
Unpaved roads - - - - - - - - -
Fires (kg)
Sector 1990 2000 2005 2012 2013 2014 2015 2016 2017
Sub-total no emissions (-) - - - - - - - -
Prescribed forest burning - - - - - - - - -
Structural fires - - - - - - - - -
Totals (kg)
Source 1990 2000 2005 2012 2013 2014 2015 2016 2017
Ore and mineral industries 1 100 000 460 000 210 000 100 000 85 000 94 000 120 000 120 000 140 000
Oil and gas industry 340 300 720 990 1 100 670 510 580 520
Electric power generation (utilities) 11 000 14 000 1 900 2 600 1 400 1 800 1 500 1 400 1 700
Manufacturing 48 000 16 000 17 000 4 700 4 600 6 400 5 900 6 500 3 700
Transportation and mobile equipment 79 000 52 000 48 000 38 000 33 000 29 000 32 000 33 000 33 000
Agriculture 30 30 26 74 76 84 70 68 66
Commercial / residential / institutional 6 300 4 800 4 600 4 000 3 500 3 200 3 200 3 200 3 200
Incineration and waste 330 390 570 590 420 440 420 400 400
Paints and solvents 4.3 6.3 no emissions (-) - 0.06 0.00 - - -
Dust - - - - - - - - -
Fires - - - - - - - - -
Grand total 1 300 000 550 000 280 000 160 000 130 000 140 000 160 000 170 000 180 000

Notes:

Totals may not add up due to rounding.

- Indicates no emissions

0.00 Indicates emissions truncated due to rounding

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