I drank Bali tap water and survived...

I refilled a 600 ml mineral bottle with tap water (to test the seal - it's a long story that involves transporting duty free vodka on a domestic flight). Anyway we took the wrong bottle to the pool and drank about half before we realised. Tasted okay, looked clear.

It's been 24 hours and no after effects. I wouldn't make a habit out of it, though. We have travelled in Asia, Africa, South America for 30 years and have always boiled tap water for coffee/tea or making ice cubes (when desperate). Good quality hotels use purified water for their ice. Bottled water is cheap, anyway.