Cost efficient water supply for two schools in Pune, Maharashtra : Need ideas

I oversee the development of two schools on the edge of Pune. They both run on bore well water though one will eventually get the city water. We need to provide drinking water for about 400 students. Of course they bring their own in a bottle but I want to set up a supply of clean water. I would love to hear from people what the most cost effective system is to clean & provide water. Also how it is stored and made available is important. We are working on low cost schools for the disadvantaged and honestly do not have the money to buy big expensive systems. But proper drinking water is a must. Kindly provide suggestions. The school's website is:  http://www.gyanankur.com

Melinda Parker
gyanankur@gmail.com

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