What is the Water Efficiency Standard for toilets as recommended by DWP?

The Water Efficiency Standard for toilets as recommended by the Department of Water and Power (DWP) is set at 1.6 gallons per flush. This standard reflects an important initiative to promote water conservation and efficiency in urban environments. Toilets that use 1.6 gallons per flush or less are designed to minimize water usage while still effectively performing their primary function of waste removal.

This standard became prevalent in the 1990s when more stringent regulations were implemented to address water scarcity issues, particularly in regions prone to drought. By encouraging the use of toilets that meet this standard, the DWP aims to reduce overall water consumption in households and facilities, contributing to broader sustainability goals. Reducing the volume of water used per flush helps in conserving water resources without sacrificing performance.

The other choices reflect options that either exceed this standard or do not align with DWP’s recommendations. For example, options with 2.0 gallons or higher are not suitable as they promote higher water usage contrary to conservation efforts. Therefore, the correct answer reinforces the importance of adhering to established standards that support efficiency and sustainability in water management.