From drinking to food production and domestic use, water serves to maintain our physical health and wellbeing. But when this most important of all resources is tainted, it can be transformed into a silent killer. According to the United Nations, water-related diseases are responsible for a staggering 80 percent of all illnesses and deaths in the developing world. These diseases include some very serious conditions like cholera, dysentery, typhoid, and polio. One particularly prevalent problem with drinking water in many locales is E. coli contamination which typically results from the presence of fecal matter. Up to two billion people worldwide rely on a water source with some level of fecal matter contamination for their drinking water.