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For nearly a century, Californians have drained an incredible amount of water from the ground to grow crops and water landscaping. It is not sustainable. The water has not returned. The result is a sinking state. Here are some startling facts about California's groundwater depletion:

The latest in water contaminates in this trend is a group of chemicals known as Perfluorinated Alkyl Substances, or PFASs (also known as Perfluoro Compounds or PFCs). Originally developed to help repel stains and improve the effectiveness of firefighting chemicals, these substances have leached into groundwater near factories, military bases and other sites where they have been used heavily. Several Granular Activated Carbon (GAC) solutions are available for treatment of PFCs in groundwater. One of the most cost-effective of these options for PFAS removal comes from coconuts: AquaCarb CX enhanced coconut shell GAC. It combines the benefits of an activated carbon with the high micropore structure of coconut shell, with faster kinetics comparable to bituminous coal.

A new study by scientists from NASA and the University of California, Irvine, has found that over 75 percent of the water loss in the drought-stricken Colorado River Basin since late 2004 came from underground resources. The extent of groundwater loss may pose a greater threat to the water supply of the western United States than previously thought.