California's water supply is not endless

California’s water plan, currently being updated, implies that our supply of water to support development is endless. This plan does not address the crucial questions of what is the limiting supply of water and what is the implication of this water supply barrier on the population that can be supported? Current state policy requires local governments to provide their “fair share” of housing to accommodate the state’s population projections and the water purveyors blindly step up and say they can supply the necessary water.

Since there is not an endless supply of water, at some point there will...