CALGreen refers to the California Green Building Code, a statewide code relating to certain categories of residential and non-residential buildings. The code mandates a 20 percent reduction in water usage for toilets as compared to the industry baseline of 1.6 gallons per flush, resulting in a water usage requirement of not more than 1.28 gallons per flush. Delta toilets are CALGreen compliant.

CALGreen is a registered trademark of the State of California Building Standards Commission.