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The Pajaro Valley, in southern Santa Cruz County close to Monterey Bay, is ground zero for high-value farm crops such as arugula, strawberries and cane berries. The area depends almost entirely on groundwater and is not connected to any intrastate transfers, so it has to rely only on local water resources.

The valley’s farms, residents and commercial businesses draw about 56,000 acre-feet (69 million cubic meters) of water each year, and 98 percent of it comes from the groundwater basin, with the balance from surface water and recycled water.

Pushing a wheelbarrow filled with 350,000 petition signatures, concerned Californians gathered outside the capitol Tuesday to urge Gov. Brown and the California Water Resources Control Board to stop the potentially dangerous practice of using wastewater from oil drilling to irrigate California’s crops.

The wastewater, sold by Chevron and California Resources Corporation, is now being used to irrigate more than 90,000 acres in the Cawelo Irrigation District and the North Kern Water Management District and is slated to expand in the near future to other districts.

Rafaela Tijerina first met la señora at a school in the town of Lost Hills, deep in the farm country of California’s Central Valley. They were both there for a school board meeting, and the superintendent had failed to show up. Tijerina, a 74-year-old former cotton picker and veteran school board member, apologized for the superintendent—he must have had another important meeting—and for the fact that her own voice was faint; she had cancer.

The Widely Used quote, “Whiskey is for drinking; water is for fighting over,” often attributed to Mark Twain, has been used by politicians from Arnold Schwarzenegger to Dianne Feinstein to describe California’s battles over water rights. The quote itself may in fact bebogus, but it does illustrate why water rights are a difficult, but critical, topic in California.

Whether growing along the rim of the Grand Canyon or living in the mist with California’s coastal redwoods, Douglas fir trees are consistently sensitive to drought conditions that occur throughout the species’ range in the United States, according to a study led by a researcher at UC Davis. The study, published Monday in the journal Proceedings of the National Academy of Sciences, provides direct evidence of the negative impact of water stress on forest ecosystems. It also pinpointed which conditions are causing low growth among Douglas fir trees.