noun
filtered water
Water that has been passed through a filter; used in contexts like water treatment, aquariums, or laboratory settings.
この装置は濾水を浄化して飲料水にする。
This device purifies filtered water into drinking water.
noun
Refers to the removal of water, often in civil engineering or agricultural contexts; less common than 排水.
大雨の後、濾水システムが機能しなかった。
After the heavy rain, the drainage system didn't work.
排水 is the common word for drainage or draining water; 濾水 is more technical and less frequent.
ろ過 is the general term for filtration; 濾水 specifically refers to filtered water or the drainage process.
Compound of 濾 (filter) and 水 (water). The kanji 濾 is not in the jōyō list, so the mixed form ろ水 is sometimes used.