The message
from Andy Hall contains these words:

It needs to. Tap water is a disgusting thing to drink.

Depends where you live. Round here it's Severn water and not very nice.
Where I grew up in Kent it came straight out of the chalk and until the
early 70s had nothing done to it all apart from filtering. That was
smashing stuff - you could cut your teeth on it it was so hard.

--
Skipweasel
Pay no attention to that man behind the curtain.