Hello my friend. It's amazing how bad water can cause damage or disease.
You are right in what you comment, boiled water sometimes has a characteristic taste that makes it not so refreshing and leaves an unpleasant sensation.
That method you mention to purify is very good, in my country there are several methods, that is one of the ones that are applied. Greetings.
Here's another method:
https://ecency.com/hive-153850/@mckane/water-and-its-inhabitants#@atma.love/re-mckane-202455t15229161z