Clean water would have BOD value of less than

Options

A. 17 ppm
B. 5 ppm
C. 200,000 ppm
D. 10 ppm

Answer

To determine the BOD (Biological Oxygen Demand) value for clean water, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding BOD**:
- BOD is a measure of the amount of oxygen that microorganisms will consume while decomposing organic matter in water. It indicates the level of organic pollution in the water.

2. **Identifying Clean Water Characteristics**:
- Clean water is characterized by low levels of organic matter. Therefore, it has a low BOD value.

3. **BOD Value Ranges**:
- Generally, the BOD values are categorized as follows:
- Clean water: BOD < 5 ppm
- Moderately clean water: BOD 3 to 5 ppm
- Polluted water: BOD 6 to 9 ppm

4. **Conclusion**:
- Since the question asks for the BOD value of clean water, we conclude that clean water would have a BOD value of less than 5 ppm.

### Final Answer:
Clean water would have a BOD value of less than 5 ppm.

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