The California Building Standards Commission (BSC) has approved the Green Building Standards Code, effectively mainstreaming green building provisions into the body of our state building codes. The adoption includes mandatory measures for new homes and new commercial buildings. Most of the mandatory provisions will take effect on a statewide basis starting in January 2011, while provisions related to water conservation will take effect on July 1, 2011. Plumbing fixtures will be required to reduce the overall use of potable water within the building by at least 20%. This includes provisions requiring that the combined flow rate of all the shower heads serving one shower stall shall not exceed the maximum flow rate of 2.0 GPM.