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
It is the operating costs that are critical.
If you look at what the Obama Administration spends on GREEN NONSENSE, then spending 10 or 15 billion on de-salination is not a bad thing -- at least taxpayers would get something...
The Obama GREEN PROJECTS have basically been flushing money down the toilet and into the pockets of Obama supporters...