Regulations, agreements, pollution, management and contacts.

Services and information

Regulations and reporting

Guidance, reports, timeline and information for owners and operators.

Frequently asked questions

Purpose, key elements, Canadian businesses, implementation.

Bilateral agreements

Administrative agreements and equivalency.

Wastewater pollution

Source and effect on ecosystems, health and environment.

Registry of transitional authorizations

List of transitional authorizations issued under the WSER.

Resource documents

Various documents about wastewater.


Contact information for the Wastewater Program.

Wastewater regulations overview

Wastewater systems effluent regulations, bilateral agreements, frequently asked questions.

Untreated wastewater in the St. Lawrence River

Comprehensive review of events leading to discharge of untreated wastewater into the St. Lawrence.

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