You mean the county with the largest(and still expanding) indirect potable reuse plant in the world? Poseidon HB desalination was rejected for a variety of reasons: enormously risky in terms of finance and water reliability(located in a flood zone, for example), excessive costs, lack of committed buyers, environmental impact, etc.. The CCC uniformly rejected it for many of those reasons with the staff report also including the lack of mitigation steps Poseidon have yet to undertake for their Carlsbad plant. Doheny desalination is still under consideration due to the use of slant wells, municipally owned, and the lack of aquifers in south county make it more viable as a means of water security.