According to the World Health Organization, 1.1 billion people, roughly 1/5 of the world’s population, are without access to safe drinking water sources. Although nearly ¾ of the surface of the earth is water, less than 1% is freshwater available for drinking and much of that is unsafe due to biological and chemical pollutants that can cause cancer, infertility, neurological disorders, etc. Currently, residents of the Pun Pun Farm, an organic farming community of 50 in rural Thailand, collect rainwater run-off from rooftops during the rainy season for their drinking water. It is not possible, however, to collect and store enough water to sustain the community during the dry seasoFiltern. Bottled drinking water is expensive and must be transported over long distances, contributing to fossil fuel consumption. Irrigation canals fed by a nearby lake would provide a reliable year-round source of freshwater, however it is contaminated by agricultural runoff from neighboring farms.