http://www.waterefficiency.net/WE/articles.aspx?taxonomy=Desalination
The first link at your list:
Carlsbad Desalination Project Wins 2013 Global Water Awards Desalination Deal of the Year
This will be the largest desalination plant in the western hemisphere. But they don’t even mention the cost.
This is a Billion Dollar plant.
http://www.sfgate.com/news/article/Desalination-plants-a-pricey-option-if-drought-5239096.php