Drink with caution. A city-specific assessment for Bangkok.
Can you…
Can you drink the tap water in Bangkok?
Last reviewed 2026 · Thailand
Bangkok scores 48/100 for tap-water safety — drink with caution. So if you’re asking whether the tap water is safe in Bangkok, the short answer is “drink with caution.” Scores above 70 mean tap water is generally safe to drink. 40–69 means treat it with caution — filtering or bottled water is wise. Below 40 means it’s best avoided straight from the tap.
Ice, brushing your teeth & cooking: what’s safe in Bangkok?
- Drinkable?
- No — don’t drink it unfiltered. Boil, filter, or buy bottled.
- Brush teeth?
- Usually fine for brushing if you don’t swallow, though the cautious use filtered or bottled water.
- Ice?
- Ice is a gamble — fine in reputable hotels and restaurants, riskier from street vendors.
- Cooking?
- Generally okay, since a rolling boil kills most pathogens; rinse raw produce with filtered water when you can.
Should you boil the tap water in Bangkok?
Boiling is a reliable fallback in Bangkok. A rolling boil for one minute kills bacteria, viruses, and parasites. It won't remove chemical contaminants or lead, though — for those you'd need a filter or bottled water. More on what boiling does and doesn’t remove.
Do you need bottled water or a filter in Bangkok?
Many visitors to Bangkok stick to bottled water to be safe, and it's widely available — just check the seal is intact. A reusable bottle with a built-in filter is a lower-cost, lower-waste alternative.
A good filter — ideally certified for microbiological removal, not just taste — makes the tap water in Bangkok safer to drink. For short stays, bottled water is still the simplest option.
How Bangkok compares to the rest of Thailand
Bangkok is rated 48/100, against 42/100 for Thailand as a whole — its water infrastructure tends to run ahead of the national average.
Common questions about tap water in Bangkok
Can you drink tap water in Bangkok?+
Bangkok scores 48/100 on our water-safety index — drink with caution. No — don’t drink it unfiltered. Boil, filter, or buy bottled.
Is it safe to brush your teeth with tap water in Bangkok?+
Usually fine for brushing if you don’t swallow, though the cautious use filtered or bottled water.
Is ice safe to use in drinks in Bangkok?+
Ice is a gamble — fine in reputable hotels and restaurants, riskier from street vendors.
Is tap water in Bangkok safe for cooking?+
Generally okay, since a rolling boil kills most pathogens; rinse raw produce with filtered water when you can.
Data & sources
City-level tap-water safety isn’t published as a single official global dataset, so the Bangkok score is derived from Thailand’s national water-safety assessment and city-specific conditions together with CDC traveler guidance. For the full country picture and its official sources, see tap water in Thailand.
Read the full methodology — how the 0–100 score is built and what it does (and doesn’t) mean.