noun
contamination level; pollution level
Used in environmental, industrial, and scientific contexts to refer to the degree of contamination or pollution.
この地域の汚染レベルは基準値を超えている。
The contamination level in this area exceeds the standard value.
汚染 is the general term for pollution or contamination, while 汚染レベル specifically refers to the measured level or degree.
Compound of 汚染 (osen, 'pollution, contamination') and レベル (reberu, from English 'level').