On Aug 8, 2:26*pm, "Dominic T." > wrote:

> I mentioned this device in my reply, however as I briefly stated above
> I would never actually trust this in real life as a well seasoned
> hiker/backpacker/camper. This reply is not so much directed to you,
> but just in general since I didn't expand too much on my distrust of
> UV sterilization.
>
> There is no way to tell if it has "worked."

Why not? Do two water sample tests pre and post UV.