In Assam, ATMs purify arsenic-laced water

A water management committee manages Barigaon’s water ATM, which uses a nanotechnology-based ion exchange resin to remove iron and arsenic from groundwater. Residents, who swipe a pre-paid card to collect water in their own containers, pay 40 cents per 20 liters or a flat monthly fee of less than $3. Water is free for families who can’t afford the fee and delivery is arranged for those who are unable to transport water. Around 250 villagers use the ATM each day and its success inspired five additional ATMs, with plans to install 172 statewide. Fees cover maintenance and the landowner’s electricity costs.

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