Hi,

I was wondering if anyone had seen any credible reviews/reports on whether the Steri Pen is as effective for all kinds of bacteria/viruses/cysts/protozoa as boiling or the Katadyn Micropur tablets (my current preferred methods of water purification). How about in cold water/dirty water (I'd strain it as best I could through a cloth, but still...)? It seems like one of those "too good to be true" items...what's the catch? I know that it could run out of batteries, break, is heavy, costs a lot, etc., but I'm concerned with its efficacy foremost. I see that it "exceeds EPA standards"...does the EPA agree?

Thanks,

K.