CEE Senior Lecturer Susan Murcott started a nonprofit enterprise in 2005 to sell a simple, low-cost ceramic water filter system to residents of northern Ghana. The system is designed to remove bacteria, viruses and other hazards from drinking water. Seeking to help people who earn less than $1 a day, Murcott’s company, Pure Home Water, had priced the water filter system at or below cost, so PHW has depended on grants and donations to stay in business. But it turns out the price doesn’t have to be so low, at least according to MIT market research. In January, 15 MIT business and engineering students spent four weeks in Ghana conducting water tests and a survey of people’s needs. Read more about the market research.