Waste discharge authorization
Last updated on September 8, 2026A waste discharge authorization is written permission to release waste into the environment under the Environmental Management Act (EMA). Find out what you need to apply, manage, and search for authorizations.
You must have an authorization in place before discharging waste into the environment. After you are authorized you need to maintain your authorization and notify the ministry of any changes.
Waste Discharge Regulation
The Waste Discharge Regulation defines what activities and types of waste need to be authorized under the Environmental Management Act (EMA)
Waste under the EMA includes:
- Air contaminants - such as dust from an industrial site
- Effluent - such as wastewater from industry or sewage
- Garbage - such as municipal and industrial garbage
- Hazardous waste - such as batteries, asbestos and waste oil
Get a waste discharge authorization
Do you need an authorization?
Review the types of waste and activities that require an authorization.
Apply for an authorization
You must get an approved authorization before discharging any waste.
Understand the process
An overview of the authorization process, including approvals and timelines.
Manage an existing authorization
Comply with your authorization
Submit reports and data, prepare for an inspection, and report non-compliance.
Change your authorization
Amend your authorization to reflect administrative and operational changes.
Find authorization information
How to find documents, reports, and monitoring data regarding authorizations.