Disasters happen. From Hurricane Sandy, Irene, Andrew and Katrina to the devastating Japanese earthquake, tsunami and nuclear meltdown, disasters strike without warning and the aftermath can be as devastating as the event. During an emergency, water supplies are often contaminated and disrupted, sometimes for an extended period of time. Without a safe supply of drinking water, healthy people who could otherwise provide for their family can become severely ill within days. At greater risk are children and infants. People take safe drinking water for granted. They don’t think about their water supplies, nor do they think about the vulnerability of...