During this period of extreme drought, there's a lot of competition for water. Farmers and city water agencies around the state are struggling with a fraction of the resources they normally get from state and federal water projects.
So where do they turn to support thirsty crops and growing populations?
Many turn to an informal water market where individuals, small companies and water agencies trade off extra resources to the highest bidder.
Reporter Lisa Krieger wrote about the pro's and cons of this trade for the San Jose Mercury News.