Region of Durham: Upcoming public alert system test on October 18 and 19


Region of Durham to test nuclear public alerting system on October 18 and 19

Whitby, Ontario – The Region of Durham will conduct its fall test of the nuclear public alerting system on October 18 and 19. The system warns people in the unlikely event of an emergency at the nuclear generating stations in Clarington or Pickering.

The test will take place during daytime hours, over two days:

  • On October 18, an auto dialer will call listed landline phone numbers, in Durham Region, that are within 10 kilometres of the nuclear generating stations. The calls will show as coming from 905-666-6291.
  • On October 19, outdoor sirens will sound for up to one minute. The sirens are within three kilometres of the stations and will be heard by people who are outdoors and in that area.

Learn how you will be alerted by looking up your address at

This is only a test, and no action is required if you receive a phone call on October 18 or hear the sirens on October 19. In a real emergency, upon hearing the sirens, you must go indoors and tune into trusted local media outlets or government channels for further instructions.

The next test is scheduled for spring 2022.

For more information, visit, or call the nuclear alerting information line at 1-866-551-5373.

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Media inquiries:

The Regional Municipality of Durham:
Liam Hatch, Communications Advisor
365-688-6456 or

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