A company’s controversial plan to sell groundwater from the Mojave Desert ran into new opposition as a Southern California water district voted against the proposal. The board of the Upper San Gabriel Valley Municipal Water District decided not to approve a nonbinding letter of intent to purchase water from the Cadiz Inc.’s proposed project. The company is looking to pump as much as 16.3 billion gallons of groundwater a year and pipe it across the desert to sell to cities in Southern California.