Water efficiency standards for indoor and outdoor water use are being developed through research and public input. The indoor calculation will initially be based on a provisional standard of 55 gallons of water a day per person in each household. The outdoor calculation is still being determined, but will account for local climate and the number of irrigable acres, including residential and commercial outdoor landscaping in the service area. Variances for special circumstances will also be allowed.
In 2025, the indoor standard is provisionally* scheduled to change to 52.5 gallons of water a day per person. In 2030, it is provisionally scheduled to change to 50 gallons of water a day per person.
*The state set the provisional standards based on national research conducted by the Water Education Foundation. Prior to implementing the final standard, the state will be conducting a study to determine an appropriate California standard.