Question

What is the BOD level of polluted water?

• A. Below 5 ppm
• B. 10 ppm
• C. Above 17 ppm
• D. 1 ppm

Answer 1

Answer:

C. Above 17 ppm

Biochemical Oxygen Demand (BOD) is the amount of oxygen required by microorganisms to decompose organic matter present in a given volume of water. The BOD of fresh water is below 5 ppm (parts per million), while the BOD of polluted water is above 17 ppm