This article does a poor job of identifying the precise problem. The layperson posts do a better job of alluding to possible culprits.

Water purification is not rocket science. You pass the water through a charcoal filter, then you chlorinate and fluoridate it, and voila, ready to use.

Any amateur hobbyist breeding in big salt water fish tanks in their basement does a lot more complicated water maneuvering than what is required for the mentioned basic plumbing needs.

It is the year 2017 and Canada's reserves struggle to reach post-dark-ages water management.

Absolutely stunning.  

Equally stunning is that our Prime Minister, who prides himself on native matters, has been so useless on this file.