Part 5 of CEPA 1999 focuses on understanding and reducing the risks posed by new and existing substances by providing the authority to determine which of these substances should be evaluated to determine whether they are "toxic", and, if appropriate, the authority to implement preventive or control measures to relevant aspects of the substance life cycle. Environment Canada shares with Health Canada the task of conducting risk assessments as well as the management associated with toxic substances.

In order to distinguish new substances from existing ones and to prescribe reporting requirements for new substances, Environment Canada has established substance inventories or "lists".

Lists of Substances

• Non-Domestic Substances List
• Domestic Substances List
  • Categorization of the Domestic Substances List
• Priority Substances List
• Virtual Elimination List
• National Pollutant Release Inventory

Schedules in CEPA

• Toxic Substances List (Schedule 1)
• Export Control List (Schedule 3)
• Waste or other matter that may be disposed of at sea (Schedule 5)

Assessments and Toxics Management

• Assessment of Substances
• Management of Toxics