Bill,<br><br>I carry a full bottle of PotableAqua in my vest pocket along with an Oven roaster bag.<br>This would be the primary method, but is limited to 25 L of water. So, I carry the instructions for:<br><br>Bleach (5.25% sodium hypochlorite)<br>HTH (calcium hypochlorite--swimming pool chlorine, 70% chlorine, need to make a working dilution)<br>Tincture of Iodine, 2% iodine, 2.4% NaI<br>Lugols Solution 5% iodine, 10% KI<br>Betadyne (10% poviodine)<br>Kahn-Vassher method (Iodine saturated water)<br>PotableAqua<br>Potassium permanganate<br>Hydrogen Peroxide<br><br>I sort of figure in an Urban Emergency various means to purify water will have to be used as 25 L will be good for personal consumption in the first few days, but larger volumes will be needed for various needs and longer times. My car kit contains Polar Pure (Kahn-Vassher) and is good for many 100's of L of water. My car and 72 hr kits also have a Katadyne or Sweet Water filter.<br><br>I think I will stick with your sheet unedited. My pagermaker skills are non-existant.<br><br>Randy<br>