Costa Rica: tap water is safe to drink.
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Tap water is safe to drink in most of Costa Rica, including San José, though in remote rural areas it's worth checking locally.
Yes — since tap water is safe in Costa Rica, ice made from it is generally fine too.
Brushing your teeth with tap water is usually fine even where drinking it isn't recommended, but if you want to be extra cautious in Costa Rica, use bottled water for that too.
Sealed bottled water from a reputable brand is widely available and the simplest safe option in Costa Rica — just check the seal is intact before drinking.
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