Governor Spencer Cox is set to approve Utah’s ban on fluoride in public water despite longstanding public health support for fluoridation. Experts warn the move could lead to more cavities, especially in vulnerable communities.

SALT LAKE CITY (AP) — Utah will become the first state to ban fluoride in public drinking water, despite widespread opposition from dentists and national health organizations. Republican Gov. Spencer Cox said he would sign legislation that bars cities and communities from deciding whether to add the mineral to their water systems.

The Utah governor’s signature is all that stands between a state ban on water fluoridation after House Bill 81 cleared its final hurdle in the legislature on Friday.