Glossary

Terms for Architecture, Green Building & Energy

This glossary includes more than 300 solar terms, as well as hundreds of additional sustainable design and construction terms.

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Blackwater

Definition: Water containing human waste from toilets and urinals. Black water contains pathogens that must be neutralized before the water can be safely reused. Typically black water, after neutralization, is used for non-potable uses such as flushing or irrigation. Does not have a single definition that is accepted nationwide. Wastewater from toilets and urinals is, however, always considered black water. Wastewater from kitchen sinks, perhaps differentiated by the use of a garbage disposal, showers, or bathtubs may be considered black water by state or local codes. Comply with the black water definition as established by the authority in your jurisdiction.