1. wastewater containing human waste from toilets
Usage: technical
2. dark-colored water in rivers or swamps, typically stained by organic matter
Usage: environmental

Examples

• The blackwater from the bathroom requires special treatment.
• Blackwater systems separate toilet waste from other household water.
• The Amazon River contains areas of blackwater stained by decomposing vegetation.
• Blackwater swamps are characterized by their dark, tea-colored appearance.
• The treatment plant processes both greywater and blackwater.
• Blackwater rivers flow slowly through dense forests.