https://www.mercurynews.com/2021/07/21/california-drought-heres-how-to-use-15-less-water/

Gov. Gavin Newsom asked California residents this month to voluntarily reduce their water use by 15%. What does this number mean for an average Bay Area household?

Based on 2020 estimates, an average Bay Area household of three individuals spends about 206 gallons of water per day. Reducing water use by 15% would mean using about 30 gallons less water per day.