|There has been much debate over the purity of tap water in Thailand, some say it's safe, others disagree. Just to be 100% certain it would be prudent to drink bottled drinking water when you first arrive. When you've been here some time you can make your own mind up if your water is safe at your house or condo. Some people so say the water purity changes from place to place. There's no real need to be chucking out the ice cubes from your drinks, this is a tad over the top. It's also quite safe to brush your teeth and shower with mains water. If a restaurant offers you a free glass of water they won't be giving you tap water, it will be water that has been purified.