Which of the following terms is not related to underground water?

Options

A. Infiltration
B. Aquifer
C. Water table
D. Potable water

Explanation

To solve the question "Which of the following terms is not related to underground water?", we will analyze each of the provided options step by step.

### Step 1: Understand the Options
The options given are:
1. Infiltration
2. Aquifer
3. Water table
4. Potable water

### Step 2: Define Each Term
- **Infiltration**: This is the process by which water on the ground surface enters the soil. It is directly related to underground water as it contributes to groundwater recharge.

- **Aquifer**: An aquifer is a geological formation that can store and transmit water. It is a crucial component of underground water systems.

- **Water Table**: This is the upper surface of the zone of saturation in the ground, where the soil or rock is fully saturated with water. It is a key concept in understanding underground water levels.

- **Potable Water**: This term refers to water that is safe for drinking. While potable water can come from underground sources, it is not specifically related to the underground water system itself.

### Step 3: Identify the Term Not Related to Underground Water
From the definitions:
- Infiltration, aquifer, and water table are all terms that describe aspects of underground water systems.
- Potable water, while it can be sourced from underground water, refers specifically to the quality of water for drinking and does not describe a characteristic of underground water itself.

### Conclusion
Thus, the term that is **not related to underground water** is **potable water**.

### Final Answer
The correct answer is **potable water**.

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