As elsewhere in Thailand, be careful with what you eat. Outside of major tourist hotels and resorts, stay away from raw leafy vegetables, egg-based dressings like mayonnaise, unpackaged ice cream and minced meat as hot weather tends to make food go bad faster. In short, stick to boiled, baked, fried, or peeled goods.
Tap water in Bangkok is said to be safe when it comes out the plant, but unfortunately the plumbing along the way often is not, so it's wise to avoid drinking the stuff, even in hotels. Any water served to you in good restaurants will at least be boiled, but it's better to order sealed bottles instead, which are available everywhere at low prices.
Take care with ice, which may be made with tap water of questionable potability as above. Some residents claim that ice with round holes is made by commercial ice makers who purify their water; others state that it is wise not to rely on that claim.
The Most Frequently Asked Travel Questions about Bangkok
Where To Stay & Best Hotels in Bangkok - updated Mar 2023
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Bangkok Travel Guide from Wikitravel. Many thanks to all Wikitravel contributors. Text is available under Creative Commons Attribution-ShareAlike 3.0, images are available under various licenses, see each image for details.