Canadian Radiological Monitoring Network
Welcome to Health Canada's “Canadian Radiological Monitoring Network” (CRMN) website. Here you will find a range of information on environmental radioactivity measurements across Canada.
The CRMN is a national network of monitoring stations that routinely collect air, precipitation, external gamma dose, drinking water, atmospheric water vapour, and milk for radioactivity analysis. The CRMN was initiated in 1959 to monitor environmental releases of radioactivity from atmospheric nuclear weapons testing and accidental releases from nuclear facilities. Currently, the network provides information on natural background radiation levels, and provides a mechanism for measuring routine or accidental releases of radioactivity in the environment. There are 26 environmental monitoring stations, plus additional sites in the vicinity of nuclear reactor locations.
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