For clear water ,its BOD should be less than

Options

A. 50 ppm
B. 17 ppm
C. 10ppm
D. 5ppm

Answer

To determine the acceptable BOD (Biochemical Oxygen Demand) level for clear water, we can follow these steps:

### Step-by-Step Solution:

1. **Understand BOD**: BOD is a measure of the amount of oxygen that microorganisms will consume while decomposing organic matter in water. It is an important indicator of water quality.

2. **Identify the Standard for Clear Water**: Clear water, which is typically considered to be of good quality, should have a low BOD. This indicates that there is minimal organic pollution.

3. **Refer to Standard Values**: Generally, for water to be classified as clear and suitable for drinking or recreational use, its BOD should be less than 5 mg/L. Values above this may indicate the presence of organic pollutants.

4. **Conclusion**: Therefore, for clear water, its BOD should be less than 5 mg/L.

### Final Answer:
For clear water, its BOD should be less than 5 mg/L.

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