This map from the CDC shows all the areas of the world where tap water is unsafe to drink. Even produce grown or washed in this water can trigger a severe bout of "Travelers' Tummy"
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When travelers visit a foreign country that has an underdeveloped water treatment system, they are at high risk of gastrointestinal infections.
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The UVeggie is a salad spinner-like appliance that uses UV-C light and water to kill microbes on produce.
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