Can you drink the tap water in Tenerife? People in the Canary Islands tend to buy bottled water because much of the tap water here is desalinated sea water – it's safe to drink but not particularly pleasant taste-wise.
It's generally safe and healthy to drink the public tap water across Portugal. Get a water filter such as TAPP 2 to improve the taste and reduce the risk of contaminants. Avoid plastic bottled water in Portugal as most plastic doesn't get properly recycled. Get a high quality reusable water bottle like TAPP.
“You can safely drink tap water in many areas of Greece,” she says. “This includes the big cities such as Athens and Thessaloniki, most of the mainland and certain islands. On smaller islands, such as Santorini, tap water is not always drinkable, so you should drink bottled water.