Is the filtered water drinkable? If not, what about distilled water or boiled water?

The filtered water depends on what kind of water it is before filtration. If there are many impurities, you can't drink them. Filtration can only filter out a large number of substances with relatively large molecular diameter, and a small amount cannot be filtered out.

Distilled water can be said to be the cleanest, and boiled water is our ordinary boiled water, which can also be used.