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There’s no such thing as being too prepared.

In the highly unlikely event of a nuclear accident, a potassium iodide (KI) pill is a key component to keeping you and your family safe. All homes and businesses within 10 km of nuclear facilities are encouraged to have on hand potassium iodide (KI) pills. Anyone within 50 km of nuclear facilities is welcome to order KI for delivery.


Frequently Asked Questions


About KI Pills

The Canadian Nuclear Safety Commission (CNSC) — the federal agency that monitors the safe operation of nuclear stations — requires that all homes and businesses within 10 km of a nuclear power station maintain a supply of potassium iodide (KI) pills. The pills are available free of charge at select pharmacies.

In the very unlikely event of a nuclear emergency and a release of radioactive iodine to the public, KI pills will help prevent the development of thyroid cancer, and are especially effective at safeguarding children's thyroid glands. It is important for each household to have a supply of these pills because they are most effective if taken just before or soon after exposure to radioactive iodine.

The distribution of KI pills is not due to any change in the risk of a nuclear emergency and is not meant to cause alarm. We believe that staying safe means being prepared, even for the most unlikely of events.

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Nuclear Safety

In the highly unlikely event of a nuclear emergency you will be promptly notified a number of ways including sirens, radio, television, Internet, automated telephone call and social media.

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What do I do?

  1. Go inside and turn on your radio or television for instructions.
  2. Listen to the media reports.
  3. Follow instructions provided by government officials.
  4. Follow instructions for evacuation, sheltering in place, taking KI pills, and reporting to a reception centre for monitoring.

And stay calm. Don’t evacuate unless advised to do so.



Enter your postal code to see if you’re within the eligible zone of a nuclear generating station.