A recently completed 3rd-party evaluation analysis (Dickinson & Gauley) identifies volumetric water savings achieved by 112 multi-residential apartment buildings located in California that installed the DrizzleX (www.drizzlex.com) sub-metering system – a system that involves separately sub-metering each water supply for all fixtures in all apartment units (including both hot and cold where applicable). The team calculated an average savings of 56 gallons per suite per day – equating to an average savings of 28.6% of PRE demands.