Ah Ken, Canada must have better water than I do! What you say about the chlorine is true, but our water in So. Cal comes out of the tap chunky with calcium and salts. That is what plugs up the root cells on the plants. We don't get any rain from April to Oct., so when my rain barrels run dry, I have to buy distilled water. I would put in an RO system, if I could find room for it.
Steve, the only way to know if your water is safe for your orchids is to have it tested. What ken said about the chlorine is true, but that isn't the only issue.
