Calgary Tap Water: Any Copper Issues?

[Enigma]

I dug through the old posts on the forum, and I noted that Calgary's tap water has been discussed a few times. Instead of bringing back posts from 2009, I've opted to start a new one.

It looks like my Mexican Turbo snails are about to bite the dust. I now understand that these are a temperate species and are not suited for reef tanks. However, I don't want to just shrug my shoulders and brush it off as a temperature (or other reef specific) issue. In doing that I could miss something that needs to be resolved.

When I set up my 10 gallon tank I used tap water. I wasn't aware that this could cause issues at the time. I did use tap water conditioner, as I was worried about chlorine. I did some top ups using tap water as well. I didn't use the conditioner for those. I did do some top ups with distilled, and my one water change so far was with distilled.

Is it possible that the copper content in Calgary's tap water could be significant enough to cause issues in my tank?