This pie chart shows the chemicals disposed of to land on site in the greatest quantities during 2019. The metal mining sector accounts for most of this disposal. To view the chemicals disposed of to land by sectors other than metal mining, toggle to the "Land Disposal, Excluding Metal Mining" chart.

Note: In this chart, metals are combined with their metal compounds, although metals and compounds of the same metal are listed separately on the TRI list (e.g. lead is listed separately from lead compounds). Percentages do not sum to 100% due to rounding.

The metal mining sector alone was responsible for 94% of the lead and lead compounds and 87% of the zinc and zinc compounds disposed of to land in 2019. Annual fluctuations occur in land disposal quantities reported by metal mines because even a small change in the chemical composition of the mineral deposit being mined can lead to big changes in the amount of TRI-listed chemicals reported nationally.

This pie chart shows the chemicals disposed of to land on site in the greatest quantities during 2019, excluding quantities disposed of by facilities in the metal mining sector.

Note: In this chart, metals are combined with their metal compounds, although metals and compounds of the same metal are listed separately on the TRI list (e.g. lead is listed separately from lead compounds). Percentages do not sum to 100% due to rounding.

From 2007 to 2019:

• Barium: Releases decreased 40%.
• Manganese: Releases decreased 23%.
• Zinc: Releases decreased 55%.

In 2019

• When the metal mining sector is excluded, a wider variety of chemicals contribute to most of the land releases. Seven different chemicals, for example, comprised 64% of land releases, as opposed to three chemicals comprising a comparable 62% of releases when metal mining is included.