What is a WAPI?
WAPIs (Water Pasteurization Indicators) are reusable devices specifically designed to melt a wax coating inside the device when water has reached pasteurization temperature and is safe to drink. In some areas of the world, people collect water from natural sources, which are often ridden with disease-causing bacteria. To prevent getting sick, the water is typically boiled prior to drinking/using. However, water does not need to be boiled in order to be safe to drink, because pasteurization (the act of using heat to kill off the dangerous bacteria) occurs at 150° F, a much lower temperature than water's boiling point (212° F). Therefore, a lot of time and resources, such as fuel and wood, are wasted when water is brought to the boiling point, rather than the pasteurization point. This is where the WAPI comes in. A WAPI contains a special wax that melts at 150° and indicates when the water is safe to drink. Thus, WAPIs help communities lacking easy access to clean, drinkable water save time, money, and energy, by indicating when their water is safe to drink, before it boils!
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