50% of the water in the Sault comes from lake superior, the other 50% comes from wells. Depends on where you are in town what water you get.
There is a well 3 blocks from my house. It is in a little block building. The water is pumped out of the ground, gets a little shot of chlorine for a just in case, and goes into the pipes.
I trust that way more than any bottle I would buy off the store shelf.
I fill a couple water jugs for going into the woods camping because you never know what you will pick up out of a creek or lake.