Kennedy Jr. has previously said that if Republican President-elect Donald Trump won the White House, the administration would advise water systems in the United States to remove fluoride. This is despite experts and officials saying the mineral is both safe and beneficial to people’s dental health.

Lee Zeldin, a longtime opponent of environmental regulation, steps into his role as EPA chief with a focus on economic growth.

Fluoride has long been considered an important health achievement, but it could be removed from water systems under the Trump administration. An estimated 75% of Americans drink fluoridated water daily.