CEE Professor Ashok Gadgil and lecturer Dr. Susan Amrose are developing a patented technology that uses electricity to remove arsenic from water, making it safe to consume. The Indian company, Luminous Water Technologies, has deployed the technology to villages in India and Bangladesh.
See Indian Company Licenses Lab Invention for Arsenic-free Water (News Center, Lawrence Berkeley National Laboratory)
See Arsenic-free Water -- Aided by Bay Area Team's Technology (San Francisco Chronicle)