Increased access to drinking water could improve kids' health, a new study found. A hallway water fountain is shown in San Francisco International High School in California's Bay Area in October 2017.

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Share on Pinterest Health agencies and experts recommend fluoride in drinking water at low levels (currently 0.7 mg/L in the U.S.) to promote dental health. LukaTDB/Getty Images HHS Secretary ...

"The U.S. Public Health Service currently recommends 0.7 mg/L, and the World Health Organization has set a safe limit for fluoride in drinking water of 1.5 mg/L." One expert welcomed the findings.