The regulation 319 you are referring is Ontario Drinking Water Regulation for Small Systems.
That regulation require (among others) small water treatment system owners or operators with primary disinfection equipment that does not use chlorination or chloramination to ensure that their disinfection equipment is designed and operated so that,
(a) the disinfection equipment has a feature that ensures that no water is directed to users of water treated by the equipment in the event that the equipment malfunctions, loses power or ceases to provide the appropriate level of disinfection; or
(b) the disinfection equipment has a feature that causes an alarm to sound immediately in the following locations if the disinfection equipment malfunctions, loses power or ceases to provide the appropriate level of disinfection:
(i) the building or structure where the disinfection equipment is installed,
(ii) a location where a person is present, if a person is not always present at the building or structure where the disinfection equipment is installed.
For those points, we recommend an UV system (Trojan Sterilite UVmax Pro 10) for your application. It is very efficient for disinfection and that will emit an alarm and shut down water production in case of water disinfection failure or malfunction.
A presentation on that regulation can be found here