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> 飲み水としての使用が認められている一部の井戸を除き、あくまでも生活用水として使うのが大原則です。([article](https://www3.nhk.or.jp/news/html/20180622/k10011491721000.html?utm_int=news-
> social_contents_list-items_003))

The difficulty I have is that according to this
[definition](https://www.weblio.jp/content/%E7%94%9F%E6%B4%BB%E7%94%A8%E6%B0%B4)
of 生活用水, 飲用 is one of the utilizations so I don't know how I should interpret
the sentence since if the waters are recognized as suitable for 生活用, they
should also be suitable for 飲み水としての使用.

What I understand from the japanese sentence: "Excepting the wells where the
usage of the water as a drinking water is approved,using the water as a daily
life water is generally acceptable".

If a certain water is not approved as a drinking water, it also shouldn't be
approved as a "daily life water" since in the japanese definition of the
japanese term for daily life water, drinking is one of the daily life uses. So
it doesn't seem to make sense to separate waters according to these two terms.
CC BY-SA 4.0
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question
reading-comprehension
What does this sentence about 生活用水 mean?
I think you are confused with the definition of 生活用水. If there is the sign
says "you can drink" or you are told you can drink, the water from well is
pure enough so that you could use it for washing, bathing, cleaning and so on.

However the water from well is normally not purified enough since it contains
water from rain or something, so you should avoid to drink it other than in
emergency or something.

The 生活用水 you use in household or restaurant should already be went through the
process of purification, so it is different from the water from well and you
can drink it.
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answer
Yes, in principle, the term 生活用水 should include drinking water as well,
especially when contrasted with 工業用水 "industrial water" or 農業用水 "agricultural
water". But in this context you have no choice but understanding this word as
"domestic water other than drinking" because the article repeatedly reminds us
so.

> 災害時には飲み水以外にも、食器を洗ったり洗濯をしたりと、さまざまな用途の「生活用水」が必要となります。
>
> 飲み水とは別に生活用水を確保するため、区内96か所が指定されています。
>
> 飲み水を備蓄する動きは広がっていますが、生活用水の確保もふだんから念頭に置いて、

I don't particularly find the usage very strange, probably because when we
simply say "use water" in Japanese (not sure whether in English), we don't
typically associate with "drinking". (Just in case, 用水 means "water for use"
or "water usage" literally.) It's something like a mismatch that all of us now
know _shellfish_ and _jellyfish_ are not _fish_ while still calling them so.
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answer