What does increasing the use of graywater in a building help with?

Increasing the use of graywater in a building primarily helps reduce the amount of potable water consumed, especially in applications like toilet flushing and irrigation. Graywater is wastewater that comes from sinks, showers, and washing machines, which can be reused rather than relying on treated drinking water for non-potable applications. By implementing systems that recycle graywater, buildings significantly lower their demand for potable water, which contributes to water efficiency and sustainability goals.

This practice also helps address issues like water scarcity and environmental impact, as utilizing graywater diminishes the overall consumption of clean water resources. This integration is essential in achieving LEED certification as it aligns with the intent to promote environmentally responsible water usage. Other options may touch upon different aspects of building efficiency, but the primary benefit of graywater reuse is its direct impact on reducing the use of potable water.