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An Anonymous Coward writes in with this story from the Press Examiner:

In the state's latest drought-conservation measure, California regulators Wednesday adopted stricter low-flow standards for showerheads in a move designed to save billions of gallons of water annually.

Standards adopted today require that all showerheads sold not exceed 2.0 gallons per minute maximum flow rate as of July 2016.

The commission predicts that the new standards will save more than 2.4 billion gallons of water in the first year and 38 billion gallons after full stock turnover in 10 years. The California Energy Commission voted Wednesday to phase in shower-head efficiency standards, limiting them to just 1.8 gallons a minute after July 2018.

In related news, the San Diego Metropolitan Water District is thanking San Diegans for saving so much water during the shortage that they will need to raise water rates:

San Diego water customers could see their bills climb about 17 percent in the next year under a proposal that would raise rates.

A proposal that city utility officials presented Monday to the Independent Rates Oversight Committee called for overall rate increases of 9.8 percent on Jan. 1, 2016, and another 6.9 percent on July 1, 2016. The increases will cover costs including the increasing price of imported water, and lower sales expected as customers slash water use 16 percent.