Vermont would join a small but growing number of states to ban plastic bags and foam food containers under a bill headed to Gov. Phil Scott (R), who has said he would sign the bill.

The bill (S. 113), passed by the state House and Senate May 22, would prohibit retailers, dry cleaners, and other businesses from supplying single-use plastic bags to customers, with any exceptions for retailers set to expire by mid-2021.

The ban would...