The U.S. Environmental Protection Agency is adding some "forever chemicals" to the list of toxins that must be reported by drinking water utilities. That's why they got the nickname 'forever chemicals,'" explained Tom Neltner, senior director of safer chemicals at the Environmental Defense Fund. About 300 million people in the U.S. receive their water from a public water system, according to the EPA. At least 45% of tap water in the U.S. is known to have PFAS in it, according to the U.S. Geological Survey. Watch the video above to learn more about how safe tap water is in the U.S.

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Persons: Radhika Fox, they're, Tom Neltner, Cheryl Norton, Fox, Neltner, Sydney Evans, Evans, Norton Organizations: Environmental Protection Agency, EPA's, Water, CNBC, Environmental Defense Fund, Utah Department of Environmental, . Geological Survey, Environmental Locations: U.S