"AL_n" wrote in message
...
What is the best way of keeping rainwater-butt-water clean and unpolluted
so that it remains safely drinkable? The rainwater will be collected from
the roof of my house via the guttering downpipe.

Thanks...

Al

Why do you want to drink rainwater out of a butt?
Just interested.
Do you not have perfectly clean and safe water coming through your taps?