Can you drink the tap water in South Korea?
Short answer
Yes — it is safe and heavily tested. Almost nobody drinks it straight anyway, out of habit rather than doubt.
Safe, and tested more than most
Seoul's supply is checked against hundreds of parameters, monitored continuously at points across the network, and the results are published by the city. On the numbers it is among the more rigorously tested tap water anywhere.
Other cities run their own systems to the same national standard. There is no region where you are advised not to drink it.
Why almost nobody does
Habit, mostly, reinforced by a long-standing preference for boiled or filtered water. You will find a water cooler in every office, most homes and nearly every restaurant, and bottled water in every fridge.
Where there is a real concern it is about the pipes rather than the supply — older buildings with aging plumbing between the mains and the tap. That is a building-by-building question, not a city-wide one.
Water in restaurants
Water is free and usually self-serve. Look for a jug on the table, a dispenser by the door, or a stack of steel cups next to it. Nobody brings it to you and nobody charges for it.
Some places serve barley tea instead, hot or cold depending on the season. It is the same gesture and equally free.
Good to know
- Restaurant water is free and self-serve — a jug on the table or a cooler by the door
- What people are avoiding is old building plumbing, not the supply itself
Yes, anywhere in the country — including from the drinking fountains in stations and parks.
No. Boil it or drink bottled — the kettle in every hotel room is there for exactly this reason.
The Bangkok utility certifies its supply as safe and drinkable. What that certification cannot cover is the building you are standing in — or anywhere outside its three provinces.
No — the instruction from the tourism board is to stick to bottled water. Read the rest of that sentence carefully though: the caution about ice is written for rural areas, not for the whole country.
In Taipei, yes — the city's water department certifies it directly drinkable. That certification is Taipei's own, and it does not travel with you.