Presence of Escherichia coil in water indicates

Options

A. Water is clear
B. Water is fully polluted
C. Inorganic pollution
D. Faecal pollution

Answer

**Step-by-Step Solution:**

1. **Understanding E. coli:** Escherichia coli, commonly known as E. coli, is a type of bacteria that is often found in the intestines of humans and animals.

2. **Indicator of Pollution:** E. coli is used as an indicator organism for water quality. Its presence in water suggests potential contamination.

3. **Fecal Contamination:** The primary implication of finding E. coli in water is that it indicates fecal contamination. This means that the water may contain pathogens from fecal matter, which can pose health risks.

4. **Health Risks:** The presence of E. coli in water can lead to serious health issues if ingested, as it is associated with gastrointestinal diseases and other serious infections.

5. **Conclusion:** Therefore, the presence of E. coli in water indicates fecal pollution, making option four the correct answer.

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