Of course, but even though it's considered perfectly safe to drink, the tap water in Catalonia and many other places in Spain is disgusting tasting if you don't filter it and most people don't even try, they just lug the 5l bottles every other day from the shops.
It's a failure at many levels to be honest and nobody in power does anything about it.
I agree, on both accounts. This is why I filter mine, but I am a super tiny minority. Everyone else just chugs plastic all day.