Word
blackwater
Phoneticsblack·wa·ter
Uncountable noun
Definition
n. 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.
Examples
“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.”
Examples
simple
“The boat has a special tank to hold blackwater.”
contextual
“Modern eco-friendly buildings often separate blackwater from greywater to treat and reuse the latter for irrigation.”
complex
“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.”
Usage
Often used in technical, environmental, or plumbing contexts to distinguish between types of domestic waste.
- Exam level
- CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C2 ProficiencyIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.8.5–9.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 6.0114–120
- Frequency
- Occasional
- Level
- C2 · Proficiency
- Updated
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