The whole oil scene in California is bad...Between the number of unplugged wells (just look at photos of South Belridge field to get an idea of the potential of what is out there) and the amount of water used in California for oil production (it is a bit different than every other basin in the U.S. due to the oil gravity - the vast majority need steam flooding, so 3-5 barrels of fresh water/bbl oil produced), the state, the one oil producer that you would think wants to be environmentally friendly, is probably the worst of the top producing states.
Don't they use water for hydraulic fracturing in Texas?