The Irvine Residential Runoff Reduction Study (R3) showed that ET controllers, which provide proper landscape water management, in combination with horticultural information (education) resulted in water savings of 41 gallons per day (gpd) in typical residential settings and 472 gpd for larger dedicated landscape irrigation accounts.
— Irvine Ranch Water District, Project Review of the Irvine ET Controller Residential Runoff Reduction Study, November 2003 (rev.)
