Is Canadian tap water purified?

Question

if not , do you think/know if boiling the water for 20 min would be sufficient?

Answer 1

Is your question: "Is Canadian tap water safe to drink?"

<I'm restraining some massive sarcasm>

Yes. It is. We have safe drinking water that is subject to all sorts of processing and safety standards.  

Answer 2

not sure if it is purified, but boiling it will work. It may have a different taste though.