The presence of E. coli in water indicates

Options

A. water is clear
B. water is fully polluted
C. Inorganic pollution
D. Fecal pollution

Answer

### Step-by-Step Solution:

1. **Understanding E. coli**:
- E. coli stands for Escherichia coli, which is a type of bacteria.

2. **Classification of E. coli**:
- It is classified as a fecal coliform bacterium. This means it is commonly found in the intestines of warm-blooded animals, including humans.

3. **Source of E. coli**:
- Since E. coli is found in the intestines, its presence in water suggests that the water has been contaminated with fecal matter from humans or animals.

4. **Implication of E. coli Presence**:
- The detection of E. coli in water is a strong indicator of fecal pollution. This means that the water may contain pathogens that can cause diseases.

5. **Conclusion**:
- Therefore, the presence of E. coli in water indicates fecal pollution, which corresponds to option D.

### Final Answer:
The presence of E. coli in water indicates **D) fecal pollution**.

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