Summary: <p>Health in India is compromised by dirty water. <a href="http://poptech.org/sameer_kalwani">Sameer Kalwani</a>’s Sarvajal enables access to clean water, enlisting local entrepreneurs to sell it and monitoring water quality remotely. Customers are happy to pay to get clean water at their doorstep. What started with 1 village 3 years ago now provides safe water to 70,000 people daily.</p>
