NEW: Occupational Exposure Registry

The Ontario government has launched Canada’s first Occupational Exposure Registry (OER) — a secure digital portal that allows workers to anonymously record workplace exposure to designated hazardous substances.

Workers can enter details about:

• what substance they were exposed to,
• how the exposure occurred, and
• what protective measures were in place at the time.

This is an important tool. Many occupational illnesses take years or even decades to develop. The OER gives workers a way to track exposures over the course of their career. Having this record can help support future medical assessments and provide valuable documentation for healthcare providers, employers, or insurers.

Learn more.

Published March 2, 2026