Ratio Utility Billing System (RUBS) is not only Legal , but also the most effective Water Conservation vehicle for older apartments with Master meter systems. 

In 2016, the California Legislature passed Senate Bill 7 which expressly legalized the RUBS protocol and system: “This bill would express the intent of the Legislature...to encourage the conservation of water...in multi-family residential rental buildings through the means either within the Landlord’s or the Tenant’s control, including ‘Ratio Utility Billing System,’ which means...the allocation of water and sewage costs to the Tenant based on the square footage; occupancy; or other physical factors of the dwelling unit.” 

Read More: Article Response 2.28.17.pdf