This is the 8965th most frequent Japanese word.
汚水
Polluted water; sewage.
汚水 refers to polluted or contaminated water, typically wastewater from industrial or urban sources in this context.
工場から汚水が河川に流れ込むことが問題となっています。
The fact that wastewater flows from factories into rivers has become an issue.
汚水 here indicates wastewater, distinguishing it from rainwater in the design of urban drainage systems.
雨水と汚水を分離するシステムが提案されています。
A system to separate rainwater and wastewater has been proposed.
汚水 refers to sewage or wastewater, emphasizing the need to treat contaminated water to protect natural ecosystems.