Some great research and data is evolving on mapping groundwater depletion.
Unfortunately, ACWA’s (Assoc. of Calif. Water Agencies) response to groundwater depletion is totally misguided – ‘if you look too closely at it, someone will want to regulate it. In the meantime, let’s pump like there’s no tomorrow.’
I suspect that a similar response would come from the grape industry itself.
And California is now the only state with no effective groundwater permitting or comprehensive regulations.