Not acceptable at any level? Do you think infinitely dilute poisons are still harmful poisons? Do you think one molecule of arsenic will kill you?
BTW, did you know that natural spring water has contaminants too? And the water in every other country? Maybe the level of contaminants is better in some places, but you don't seem to be paying attention to that.
And did you know that all filters do is reduce the level of contaminants? There is no such thing as an absolutely perfect filter.
Yes. And the air we breathe is full of dangerous microbes. Almost anything we touch or ingest contains something risky. The bodies of human beings, as the bodies of all living organisms, include adaptations to deal with less than ideal environments.
As an actual matter of fact, tap water in quite a few parts of the United States is all but sterile.
BTW, did you know that natural spring water has contaminants too? And the water in every other country? Maybe the level of contaminants is better in some places, but you don't seem to be paying attention to that.
And did you know that all filters do is reduce the level of contaminants? There is no such thing as an absolutely perfect filter.