Can you water orchids with tap water?

Yes: tap water is fine. A large amount of chloring is bad for orchid roots, but the amount in tap water isn’t enough for that. If you’re worried, you can leave the tap water for a few minutes and the chlorine dissipates. If anything, distilled water is worse because it doesn’t contain any minerals. When you water an orchid with distilled water, it actually sucks out minerals from your orchid’s roots, which is bad.