The EPA will review scientific information on potential harms fluoride may cause as it rethinks its standards limiting how much of the mineral can be in drinking water, Administrator Lee Zeldin announced on Monday.

Zeldin spoke at a press event in Salt Lake City, Utah, with Robert F. Kennedy Jr., secretary of the Department of Health and Human Services, who has long voiced concerns about adding fluoride to drinking water.

The announcement follows a report the National Toxicology Program, part of HHS, released last year saying that it had “moderate confidence” that fluoride exposure above 1.5 milligrams per liter (mg/L) …