National Dose Registry

The National Dose Registry (NDR) contains the dose records of individuals who are monitored for occupational exposures to ionizing radiation. The NDR started collecting data from 1951 and now has records for over half a million workers, including well over 100,000 who are currently monitored. It now contains monitoring records back to the 1940's.

Occupational exposures to X-rays are within the jurisdiction of provincial governments in most cases. For more information on X-ray regulations, please contact your province or territory.

Exposures to radiation from nuclear reactions and radioactive decay are within the jurisdiction of the  Canadian Nuclear Safety Commission (CNSC).

Functions of the NDR:

  • Assist in regulatory control by notifying regulatory authorities of overexposures within their jurisdiction.
  • Evaluate dose trends and statistics to answer requests from regulators and others.
  • Contribute to health research and to the scientific knowledge on risks from occupational exposure to ionizing radiation.
  • Provide dose histories to individual workers and organizations for work planning and for compensation and litigation cases.

All information provided by the NDR, including dose histories, may be subject to confidentiality requirements.

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