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The WATA device

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Sodium hypochlorite is one form of chlorine used for water disinfection. It can be manufactured in most locations since it can be obtained through the electrolysis of salt water. Bottles can be purchased for household water treatment from many manufacturers in various sizes. Chlorine concentrations range from 0.5 to 10% and each product has its own instructions for correct dosing of contaminated water. Liquid household bleach also contains sodium hypochlorite, and is widely available.

The problem is that in many developing countries, chlorine is imported, rather than produced locally. This increases the price tremendously as it adds transportation, storage, and other related costs. Often also the source and transportation is not reliable in certain remote areas. The WATAsol devices, developed by [http://www.antenna.ch/en/~~drinking-water.html~~ Antenna Technologies] allow chlorine to be produced locally, on different scales to provide chlorine disinfectants for individual households, health centres and hospitals, and emergency relief.

WATAsol is now being produced in around 50 countries. It reaches the people in need through local NGOs, and local community and private enterprises. Starting from 2009, Antenna Technologies is hoping to expand their reach further through partnership-franchises with local enterprises as partners. The WATAsol has also been incorporated in development programmes led by other organizations.

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