I went to the Taipei Water Department and got all the info, which will be the same as some things already posted in this thread. Other cities may differ, but it’s as safe to drink Taipei water straight from the tap as other advanced countries, and it’s significantly safer than the water I’ve been drinking my whole life, which has never been anything close to unsafe.
links to Water Department info:
english.twd.gov.tw/ct.asp?xItem= … &mp=114012
english.twd.gov.tw/ct.asp?xItem= … &mp=114012
There are two health issues: microbes and chlorine. The level of microbes is fine. I’ve always thought the fear of ingesting an unacceptable level of microbes was irrational because showering will introduce the same feared microbes via your orifices, mucous membranes, and skin. (I personally have been poisoned via the skin.) It would be really dumb to shower in water that’s unsafe to drink due to microbes. As for chlorine, the residual amount is far below what I’ve drunk my whole life, and lower than most other countries that have data. You can, however, remove more of the chlorine by boiling for five or more minutes or filtering with charcoal, so at least there’s a rational basis there, even though the residual chlorine is well within the limits of acceptable risk. There’s no danger of microbes contaminating water that has stood for three days or less. So if water is flowing regularly, then old buildings are just as safe as new ones. After three days, the chlorine level becomes low enough to allow microbes to multiply.
To sum up, the kind of two-stage undersink filter in my picture has no health related benefit. It does make the water taste better, but the WD said better taste invariably means what that person has become accustomed to. People get used to a filter they believe in, then any other taste becomes subjectively bad. That jibes with my experience, and what’s more, when you install a new filter (or new equipment), you get that new filter taste, which isn’t all that great either. It’s just that you believe the new filter taste signifies healthiness, so you accept it and become accustomed. They said natives’ irrationality regarding water safety is higher here than in other countries, despite Taipei’s water meeting the highest international standards. That seems harmless enough, and maybe there’s some marginal benefit to eliminating more chlorine or constantly taking action against microbes so that if there’s a sudden disaster, you’ll be protected. You can also lessen your chances of being struck by lightning by never leaving the house when it’s raining. Or perhaps if a giant government conspiracy to misrepresent the water quality ever develops, you’re clear there.
Food-based paranoias spread fast and go quite deep, too. For example, the famous cases of Church’s Fried Chicken and Bubble Yum. With commercial food products, though, there’s a lot of money behind quashing false rumors (and true ones, too) because owners’ wealth is at stake. But this water thing looks intractable, and the marginal or even zero reduction in risk isn’t exactly harmless when you consider the environmental impact and wealth redistribution caused by the bottled water industry. I think the advanced filtration devices and boiled water machines don’t represent the kind of cash cow that bottled water does, and boiled water has a practical use if you like to drink hot beverages. But I’d rather reclaim my counter space than be totally prepared for tea 24/7. Anyone want a slightly used this?: