Metal and diamond mining effluent1
Metal and diamond mining effluent
Environment and Climate Change Canada is responsible for the pollution prevention provisions of the Fisheries Act and its associated regulations, such as the Metal and Diamond Mining Effluent Regulations. Owners and operators of metal and diamond mines in Canada may be subject to the Regulations.
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Services and information
Services and information
Overview of the Regulations
Information for mine owners and operators. Overview of reporting requirements, new requirements as of 2021, information about final discharge points and other resources.
Reporting through the Mine Effluent Reporting System
Information for owners and operators about reporting under the Regulations.
Laws and Regulations
Read the Regulations, review recent amendments and obtain information about planned changes and consultations.
Environmental effects monitoring
The Regulations require mines to conduct studies to assess if their effluent is having an effect on fish, fish habitat and use of fisheries resources. Find out more about these studies and reporting to the Environmental Effects Monitoring Electronic Reporting System.
Data and annual reports
Find out more about the information reported by owners and operators of mines under the Regulations.
Tailings impoundment areas
Authorization to deposit mine waste into a tailings impoundment area may require a regulatory amendment to list the water frequented by fish on Schedule 2 of the Regulations.
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2025-12-02