blackwater
n. uncountablen. waste water from toilets that contains human waste. It is different from greywater, which comes from sinks and showers.
n. wastewater containing human excreta, typically originating from toilets and urinals. Distinguished from greywater by its higher level of contamination and the requirement for more intensive treatment.
The boat has a special tank to hold blackwater.
Modern eco-friendly buildings often separate blackwater from greywater to treat and reuse the latter for irrigation.
Effective management of blackwater is a critical component of urban sanitation, as untreated discharge can lead to the rapid spread of waterborne pathogens and severe environmental degradation.
Often used in technical, environmental, or plumbing contexts to distinguish between types of domestic waste.