Poseidon Water’s controversial proposal for a desalination plant in Huntington Beach won a key permit Thursday, April 29, when the Santa Ana Regional Water Board cast a split vote approving a compromise less stringent than the environmental terms proposed at board’s April 23 hearing.

Poseidon, which has been working on the project for 22 years, now needs a permit from the state Coastal Commission before it can negotiate a final contract with the Orange County Water District to buy the water. And, in the wake of the regional board’s decision, there’s likely an additional obstacle, as opponents of the project said they plan to appeal.