New shower-heads sold in California will be the most water frugal in the nation.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.The current standard is 2.5 gallons a minute.The commission already tightened standards for faucets and urinals.The state has also announced a $30 million rebate program to replace old toilets and lawns. Click here to apply for rebates.