A detailed evaluation of routine radiation emissions from the reactors would also require a very technical discussion, as it depends upon the specific type of radioactive isotope being considered and emission pathway (e.g., water or airborne). However, all emissions must meet strict regulatory requirements established by the Canadian Nuclear Safety Commission (CNSC), which is the regulatory authority for nuclear substances in Canada. CNSC document Tritium Releases and Dose Consequences in Canada in 2006 contains information on tritium releases from reactors. Section 4.1.2 shows that tritium releases from the nuclear generating stations in Canada are all well below allowable limits.
Health Canada operates the Canadian Radiological Monitoring Network, which takes various measurements of radioactivity including tritium in water vapor around nuclear power plants. You can find this information here.