filtered or bottled water is better, tap water is just used water full of chemicals and I doubt that is healthy for any human let alone a pet. What type of water do you give your pet?
I drink tap water and my dog certainly drinks tap water. Bottled water barely tastes different and is certainly not worth the cost - or more importantly the environmental impact.
Talk about first world issues; giving bottled fvcking water to your pet. Wouldn't be surprised if I next read that supermarket pet food can't be good for my cat and I should only be feeding it A5 Wagyu Chateaubriand.