Land Disposal by Chemical & Industry

This pie chart shows the chemicals disposed of to land on site during 2023. The metal mining sector accounts for most of this land 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).

The metal mining sector alone was responsible for 85% of the lead, zinc, and barium disposed of to land in 2023. These three chemicals made up 61% of the total quantities of TRI chemicals disposed of to land. These metals may be disposed of at metal mines in “waste rock” which is the rock extracted at a mine that does not contain sufficient concentrations of the mine’s target metals.

This pie chart shows the chemicals disposed of on site to land during 2023, excluding quantities from 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).

• When the metal mining sector is excluded, a wider variety of chemicals make up the majority of land releases.
  • Hydrogen sulfide: Most land releases were from the natural gas processing sector.
  • Zinc: Most land releases were from the primary metals sector.
  • Barium: Most land releases were from the electric utilities sector.