Much has been made of the San Joaquin Valley's water problems.  Too many farms did not get the water they needed, which destroyed their owners' and workers' livelihoods.  Of course, there is plenty of water underground; the problem is that it has been poisoned with toxins such as selenium, boron, and other mineral salts.  Much of this farmland, centered in west Fresno County has been lost because of the contamination, but there could be a clean tech solution on the way.