Black water refers to wastewater that contains human waste and is typically generated from toilets. It is considered highly contaminated and poses health risks due to the presence of pathogens and harmful bacteria. This type of water is distinct from grey water, which comes from sinks, showers, and washing machines and is less contaminated. Proper treatment and disposal of black water are essential to prevent environmental pollution and protect public health. Systems like septic tanks or municipal sewage treatment facilities are commonly used to manage black water safely.