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The U.S. Centers for Disease Control and Prevention has a fact sheet recommending one of four methods to make the water safe: [8] Boil: Use water that has been previously boiled for 1 minute and left to cool. At elevations above 6,500 feet, boil for 3 minutes. Filter: Use a filter designed to remove some water-loving germs.
The entire process is powered by suction, similar to using a conventional drinking straw, and filters up to 4,000 litres (1,100 US gal) of water. [9] While the initial model of the filter did not remove Giardia lamblia, [10] current models remove a minimum of 99.999% of waterborne protozoan parasites including Giardia and Cryptosporidium. [11]
The Tata Swach is a water purifier developed by Tata Chemicals, a part of the Tata group in India. [1] Swach was designed as a low-cost purifier for Indian low-income groups, who lack access to safe drinking water. [2] [3] The product is sold in three variants as Tata Swach, Tata Swach Smart and Tata Swach Smart Magic. [4]
The Portable Aqua Unit for Lifesaving (short PAUL) is a portable ultrafiltration-based membrane water filter for humanitarian aid. It allows the decentralized supply of clean water in emergency and disaster situations for about 400 persons per unit per day. The filter is designed to function with neither chemicals nor energy nor trained personnel.
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