Tata's "Swachh" compact water purifier aims to be world's cheapest water purifier. The purifier models are priced between $17 to $22, less than half the lowest priced purifiers currently in the market. The $6 purifiers use paddy husk ash filters, which last 800 gallons, enough water to meet the drinking water needs of an Indian family for a year. The water purifier does not require running water or power, meets the U.S. EPA standards and is aimed at the rural Indian market. Tata aims to sell a million units in the first year.
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