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Environmental and Workplace Health

Canadian Radiological Monitoring Network

Managed by the Radiation Surveillance Division of Health Canada's Radiation Protection Bureau, the Canadian Radiological Monitoring Network (CRMN) is a national network that routinely collects air particulate, precipitation, external gamma dose, drinking water, atmospheric water vapour, and milk samples for radioactivity analysis. Initiated in 1959 to monitor environmental release of radioactivity from atmospheric nuclear weapons testing and accidents at nuclear facilities, the current surveillance activities of the CRMN serve to establish background radiation levels across Canada. This in turn provides a sensitive frame of reference from which to reliably identify and measure the intentional or accidental release of radioactivity into the environment. As such, the network plays a key role in Canada's nuclear emergency preparedness and response efforts.