Asia · Last reviewed 2026-04-29

Can I drink tap water in
Thailand?

🚫Avoid tap water

Tap water in Thailand is not safe to drink — bottled water is universally available and inexpensive across Bangkok, Chiang Mai, Phuket, and the islands.

At a glance

What's safe in Thailand

💧

Drink tap water

🪥

Brush teeth

🧊

Ice in drinks

💡Bottled or filtered water is recommended

In more detail

What you should know

Regional variation

Ice in restaurants is usually made from filtered water and is generally considered safe — but ask if unsure, especially at street stalls.

Traveller notes

Practical water tips for Thailand

Use bottled water in Bangkok, Chiang Mai, Phuket, Krabi, Koh Samui, and island guesthouses.

Factory-made ice is common and usually tubular with a hole through the middle; crushed block ice is less reliable.

Most hotels provide bottled water daily, but bathroom tap water should still be avoided.

Practical advice

How to stay hydrated safely

Buy bottled from reputable shops

In Thailand, buy sealed bottled water from supermarkets, hotels, or established shops. Check the seal is intact before drinking — refilled bottles are sold in some markets.

Use a travel water filter

A filter bottle (LifeStraw, Grayl, Sawyer) covers any tap source and saves money and plastic on longer trips. UV pens (SteriPEN) also work for clear water.

Boil water if you have a kettle

A full rolling boil for at least one minute kills bacteria, viruses, and protozoa. This is the cheapest and most reliable treatment if your accommodation has a kettle.

Be careful with ice and food washing

Avoid ice unless you can confirm it was made from filtered or bottled water. Salads and unpeeled fruit washed in tap water can also carry pathogens — peel fruit yourself or order cooked vegetables.

If you do get sick, hydrate aggressively

Traveller's diarrhoea is usually short and self-limiting. Oral rehydration salts (ORS) are widely available — keep sipping fluids. See a doctor if symptoms persist beyond 48 hours, you have a fever, or you see blood.

FAQ

Thailand tap water · questions

Can I drink tap water in Thailand?

Tap water in Thailand is not safe to drink — bottled water is universally available and inexpensive across Bangkok, Chiang Mai, Phuket, and the islands.

Is it safe to brush my teeth with tap water in Thailand?

No — use bottled water for brushing teeth in Thailand. Even small amounts swallowed during brushing can carry waterborne pathogens.

Is ice safe in restaurants in Thailand?

Avoid ice in Thailand unless you can confirm it was made from filtered or bottled water. Reputable hotels and tourist restaurants usually use safe ice — street vendors often don't.

What about hot drinks like coffee and tea in Thailand?

Boiling water for at least one minute kills most pathogens, so hot tea and coffee made from properly boiled water are generally safe even where tap water isn’t. Be cautious of warm drinks that may not have been brought to a full boil.

Should I bring a water filter to Thailand?

Yes — a reusable bottle with a built-in filter (LifeStraw, Grayl, Sawyer) saves money and plastic over buying bottled the entire trip. UV pens (SteriPEN) also work for clear water.

When was this guidance last reviewed?

Last reviewed 2026-04-29. Tap water conditions can change after major infrastructure events or boil-water notices — always check the latest official sources before travelling.

Sources

Disclaimer: This is general traveller guidance for Thailand, not medical advice. Conditions change after infrastructure incidents or boil-water notices — always check official sources before drinking. Last reviewed 2026-04-29.

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Can I drink tap water in
Thailand?

What's safe in Thailand

What you should know

Practical water tips for Thailand