wastewater
n. uncountable B2 Upper Intermediate US //ˈweɪstˌwɔtɝ// waste·water
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.
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.