CSA B483.1
“Overview: Canadian Standards Association (CSA) developed additional requirements, outside the existing NSF/ANSI standards, to meet plumbing, mechanical, and electrical requirements for drinking water treatment components and complete systems. Products under this scope include POU and POE plumbed systems and POU non-plumbed systems. The regulation will go into Canadian National Plumbing Code in 2010 but provinces can adopt the standard at any time.” (source)