Posted by: hikermor
Yet Another Way to Sterilize Water - 03/26/10 11:28 PM
"Retrieve A discarded water bottle. Tear off the label and fill with any water that's not too murky from a creek, standpipe, or puddle. Place the bottle on a piece of metal in full sun. In six hours the UVA radiation will kill viruses, bacteria, and parasites in the water, making it safe to drink"
National Geographic, April, 2010
Known by the acronym SODIS, this is evidently used in the third world to provide economical pure water. The article further states that PET plastic is preferable and "water from sun-warmed bottles is safe to drink."
I have never tried this, but I have heated up water many times is a solar water shower, and the water can get uncomfortably hot after a full day's exposure. This is certainly a technique that is simple and cheap, although it won't be very useful if you must travel. I have been in situations where this technique would have been very helpful. I would consider NG a generally reliable source.
National Geographic, April, 2010
Known by the acronym SODIS, this is evidently used in the third world to provide economical pure water. The article further states that PET plastic is preferable and "water from sun-warmed bottles is safe to drink."
I have never tried this, but I have heated up water many times is a solar water shower, and the water can get uncomfortably hot after a full day's exposure. This is certainly a technique that is simple and cheap, although it won't be very useful if you must travel. I have been in situations where this technique would have been very helpful. I would consider NG a generally reliable source.