I'm off this summer for 6 weeks of trekking across the Silk Road in China. I think it'll be an experience of a lifetime -- and an opportunity to take some great photographs. But that's not what I want to blog about today. Today's topic is: Purity of Essence .... errr... water (in a Strangelovian sense)
That is, in the nether reaches of the world, you're not always guaranteed to have fresh water. Even in Beijing and Shanghai, you're warned not to use the water from the hotel taps for drinking -- instead, boiled water in thermoses or spring water in sealed PET bottles is provided.
When I went to my travel doctor for the usual pre-travel battery of injections (HPA, HPB, DtP, tentanus, and influenza), he also recommended that I think about purity of water as well, since Western China is still developing. The main fears that I have about water are:
- Viruses: Hepatitis (even with vaccination, it's best to avoid exposure)
- Parasites: cryptosporadia and other protozoa, etc.
- Bacteria of all sorts
- Industrial pollutants: pesticides, heavy metals
When hiking in the American backcountry, I've usually relied on iodine tablets such as Potable Aqua or my little MSR filter. But my MSR filter (which didn't work against viruses such as Hepatitis) was lost in the Black Hole of Moving and Iodine doesn't work against Cryptosporadia. My doctor recommended chlorine dioxide tablets, but I noticed that it would take 4 hours of treatment before they killed all the little buggers.
Being a gadget-girl, I couldn't fail to notice the latest high-tech weapons race against ailments of the stomach and liver. (more after the jump)