Bottled water is not necessarily safer than tap water. Up to 44% of bottled water comes from municipal water sources and is then bottled. While the FDA regulates bottled water, it does not have the same mandatory testing requirements as the EPA's regulation of public water systems. Unfiltered tap water can contain chemicals, microorganisms, and pharmaceuticals that pose health risks such as gastrointestinal diseases, neurodevelopmental issues, and kidney problems. It is recommended to test your home tap water and use a water filtration system for safety.