Question

A water body has high BOD indicating that water is

• A. Being contaminated with sewage
• B. Being aerated
• C. Receiving minerals
• D. Atrophic

Answer 1

The correct option is A Being contaminated with sewage

Biological Oxygen Demand indicates the increase in presence of organic matter in the water body. High BOD indicates the great amount of organic matter. The dissolved oxygen in water is consumed by bacteria to decompose the organic matter of sewage or other discharges thereby depleting the oxygen of the water body. The decrease in oxygen can kill the aquatic life in water body.

Hence, the correct answer is 'Being contaminated with sewage'.