Drinking water

Hi
Probably already been asked a few times but here goes.
Is the water safe to make brews with? We usually use bottled water but I have read on here that the hotel we are staying in does not allow you to take your own stuff up to the rooms - even water and that they charge 4tl for 1ltr of water, I am sure it is much cheaper in the supermarket.
If I can't use the tap water I am going to have to smuggle it in as I am not willing to be ripped off!
Probably already been asked a few times but here goes.
Is the water safe to make brews with? We usually use bottled water but I have read on here that the hotel we are staying in does not allow you to take your own stuff up to the rooms - even water and that they charge 4tl for 1ltr of water, I am sure it is much cheaper in the supermarket.
If I can't use the tap water I am going to have to smuggle it in as I am not willing to be ripped off!