English Reference

Word

wastewater

Phoneticswaste·water

/ˈweɪstˌwɔtɝ/

Uncountable noun

Definition

n. water that has been used in homes, businesses, or factories and is no longer clean. It often contains waste or chemicals and needs to be treated before it can return to nature.

n. water that has been used and contaminated by domestic, industrial, or agricultural processes. It typically requires treatment to remove pollutants before being discharged into the environment.

Examples

“The city built a new plant to treat wastewater.”

“Engineers are developing more efficient ways to filter wastewater so it can be safely reused for irrigation.”

“The rapid expansion of the industrial zone has put significant pressure on the local wastewater infrastructure, leading to concerns about the potential contamination of nearby groundwater reserves.”

Examples

simple

“The city built a new plant to treat wastewater.”

contextual

“Engineers are developing more efficient ways to filter wastewater so it can be safely reused for irrigation.”

complex

“The rapid expansion of the industrial zone has put significant pressure on the local wastewater infrastructure, leading to concerns about the potential contamination of nearby groundwater reserves.”

Real-World Examples

“By comparison, a parallel Eawag study on microplastics from Swiss wastewater treatment plants estimates the input via treated wastewater at only about 5 metric tons annually.”
Phys.org 11 Sept 2026
“Crops are commonly irrigated with reclaimed sewage wastewater.”
The Conversation 10 Aug 2026

Word family

This entry

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.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL 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: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Frequent
Level
B2 · Upper Intermediate
Updated

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