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Definitely in China and Russia, where I'm also careful to rinse the toothbrush using bottled water and to avoid getting shower water around my mouth to avoid swallowing a little bit of it. Also in most of the third world, even in top hotels that claim to have safe purified water. (I also reject all ice cubes.)
Not in most of Western Europe, USA, Canada, Japan, etc. I drink bottled water at home because of the taste, but like the tap in many places.