noun
source of pollution; pollution source
Refers to the origin or cause of environmental contamination, such as a factory, vehicle emissions, or chemical spill.
工場が川の汚染源になっている。
The factory is a source of pollution for the river.
汚染源を特定するために調査が行われた。
An investigation was conducted to identify the pollution source.
原因 is a broader term for 'cause' or 'origin', whereas 汚染源 is limited to environmental pollution sources.
Compound of 汚染 (osen, 'pollution') and 源 (gen, 'source, origin'). The reading おせんげん follows standard on'yomi.