The massive desalination plant in Carlsbad that accounts for about 10 percent of the drinkable water in San Diego County is reportedly about to be sold for more than $1 billion to a subsidiary of an investment company based in Scotland, but the San Diego County Water Authority it does not expect a potential sale to affect customers in the area. Bloomberg News on Thursday quoted “people with knowledge of the matter” who said an affiliate of Aberdeen Standard Investments, based in Edinburgh, Scotland, is about to buy the Claude “Bud” Lewis Carlsbad Desalination Plant and the deal may be announced as soon.