Sorry, I couldn’t resist the headline. But seriously,
the California Energy Commission has voted on water efficiency standards for shower heads that will be the highest in the country:
Current rules, established in 1994 at the federal level, allow a maximum flow of 2.5 gallons per minute from a shower head. Effective next July, the limit will fall to 2.0 gallons per minute and will be reduced again in July 2018, to 1.8 gallons, giving California the toughest standard of any U.S. state. - LA Times
About 30% of fixtures currently available meet this new requirement. According to the NRDC, this new GPM limit will save California as much water annually as the city of San Francisco uses per year. That is, if anyone in CA is still showering by this time next year. #CAdrought and all.