Q417
A high Biological Oxygen Demand (BOD) indicates that:
A.
water is pure
B.
absence of microbial action
C.
Low level of microbial pollution
D.
High level of microbial pollution
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
A high BOD indicates the presence of a large number of microorganisms, which suggests a high level of pollution.