You cannot drink water that comes from the tap, unless it is thoroughly boiled for 3 minutes.
When you arrive in your hotel almost all the time you will find a bottle of water waiting for you in hotels. Use this water when brushing your teeth. Make sure you always have enough drinking water with you. In a warm climate it is wise to drink 2 liters of water per day.
To avoid plastic waste, you can buy a 19 liter tank that can be refilled at any time, or download the Refill My Bottle app and find all the places where you can refill your bottle for free or for a small fee.
This can be a shop, café or, for example, a museum. RefillMyBottle strives to get travelers and local businesses to work together against the waste problem.