The owners of Carlsbad Desalination Plant in California have hired an adviser ahead of a potential sale, according to people with knowledge of the matter.

The Claude “Bud” Lewis Carlsbad Desalination Plant, named after a former mayor, is owned by Orion Water Partners LLC, which is a joint venture comprising Stonepeak Infrastructure Partners and Poseidon Water, an affiliate of Brookfield Infrastructure Partners LP. The plant could fetch more than $1 billion, including the assumption of debt, said the people, who asked not to be named. Representatives for Stonepeak and Brookfield declined to comment.