Safe South Korea · Last reviewed: August 28, 2026

Is Tap Water Safe to Drink in Seoul?

Q: Can you drink tap water in Seoul?

Yes, Seoul's tap water (arisu) is treated to a safe standard and meets government and WHO quality guidelines.

Q: Why do Seoul residents still boil tap water if it's safe?

It's largely cultural habit tied to concerns about older apartment building plumbing affecting taste, not an indication the treated water itself is unsafe.

Q: Is Seoul tap water safe for tourists?

Yes, it's safe for tourists to drink directly from the tap.

Yes, tap water in Seoul (arisu) is treated to a safe standard and meets government and WHO quality guidelines, though many residents still filter or boil it out of habit.

Hardness

Soft to moderate

Country

South Korea

Rating

Safe

Soft

Moderate

Hard

Very Hard

Water Source

Seoul's water authority treats water from the Han River to government standards regulated by the Ministry of Environment, branding the finished product "Arisu."

Contaminants & Concerns

No significant health concerns in treated supply. Some older apartment buildings have aging internal plumbing or rooftop storage tanks that can affect taste.

Tips

•Public water fountains, particularly in subway stations and parks, are safe to drink from
•Many households use a purifier or boil water purely by habit, not necessity
•Bottled water is widely available if preferred

Frequently Asked Questions

Can you drink tap water in Seoul?

Why do Seoul residents still boil tap water if it's safe?

Is Seoul tap water safe for tourists?

Sources & References

The safety rating and guidance on this page draw on the following sources. See our full methodology.

•WHO Guidelines for Drinking-water Quality
•CDC Travelers' Health destination pages
•The municipal water utility's published quality data

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