I just figured it was common knowledge, but never conducted any research myself to verify. That is, any research besides all my Chinese friends restating the “No you can’t drink it” sentiment.
You can always just fill up a glass from the tap yourself, chug it, then sit down and fold your hands over your lap and wait anxiously for something to happen, taking minutes like a scientist and thus proving yourself a nice pair of empirical balls in the process, regardless of the result.