A draft scientific criteria document for Canadian Soil Quality Guidelines for the Protection of Environmental and Human Health– Zinc is available for public review and comment until January 16, 2017. The scientific criteria document includes English and French summaries.
Zinc is an essential element for plant and animal life that is naturally present and found widely in nature. However, too much zinc can be harmful. Worldwide, human and non-human sources release roughly equal amounts of zinc into the environment. Human releases of zinc into the environment come from sources such as electroplaters, smelting and ore processors, mine drainage, domestic and industrial sewage, combustion of solid wastes and fossil fuels and road surface runoff. The largest natural source to the atmosphere is wind-blown dust, although emissions from sea-salt spray may also be significant, particularly in coastal regions. Erosion is the largest natural source of zinc to surface water.
Please submit comments to:
Canadian Council of Ministers of the Environment
360 - 123 Main Street
Winnipeg, MB R3C 1A3