The best water filtration system is the large capacity gravity fed ceramic filter Katadyn. Swiss-made, field tested, expensive. It will produce enough water for 10 adults if constantly supplied with water to filter. Rate of filtration depends upon the amount of mud, etc., in the water being filtered. Smaller models are available. The big Katadyn's have been widely used in Third World countries and are very highly regarded.
Offered by George E.
The Katadyns are nice, it just takes more effort than you would imagine to fill a water bottle. I have a pocket filter for my BOB and Im looking at a drip filter for the house. Water filters are nice, but I recommend having an extra filter and a backup system. Im a firm believer in having several redundant systems for each area.
Offered by Mike.