Sinking land, poisoned water: the dark side of California's mega farms

The floor of the Central Valley is slumping, and there is arsenic in the tap water. Now it seems the two problems are connected

Isabel Solorio can see the water treatment plant from her garden across the street. Built to filter out the arsenic in drinking water, it hasn't been active since 2007 - it shut down six months after opening when the California town of Lanare went into debt trying to keep up with maintenance costs.

Related: 'Nothing to worry about. The water is fine': how Flint poisoned its people