1. The soil should be clean, and garbage or harmful substances should not pollute the well water. It is best to go to a specialized agency to test the water quality.
2. The well should not be too deep and should not be level with the ground. It should be higher than the ground and have bricks and stones to block it. It is better to have a cover. This can prevent dirt from falling in and make people feel safer.
3. The well should not be located at the water level in a polluted area, nor should it be close to toilets, ditches and garbage dumps. Well water from nearby mines with heavy metals such as lead or sulfur hot springs that are harmful to the human body should not be used as drinking water. The shape of the water well should be square, round, or trigram shape.
Extended information:
In rural areas and small towns, there are many wells, which are signs of people's use of groundwater. Of course, well water cannot be drunk directly (except for washing). It contains many impurities and must be precipitated with alum before it can be boiled and drunk.
Everyone who has used well water has this experience, that is, well water is "warm in winter and cool in summer." The fact that well water is warm in winter and cool in summer is just a feeling among us, not that the well water itself actually gets warmer in winter and cooler in summer. The temperature of well water does not change much throughout the year. The main reason is that the water under the ground is very little affected by changes in temperature on the ground. The temperature change between well water in summer and well water in winter is at most 3 to 4 degrees.
On the ground, the temperature changes greatly between summer and winter. In winter, the temperature on the ground drops very low, and the temperature of the well water, which does not change much, is much higher than the temperature of the air on the ground, so we feel warm when we touch it.
Conversely, in summer, when the temperature on the ground rises very high, the temperature of the well water is much lower than the temperature of the air on the ground, so we feel cool when we touch it. .
Not only well water can make people feel warm in winter and cool in summer. Even underground water, caves, and cellars are all like this. People can take advantage of this to store fruits and vegetables in cellars in winter to prevent them from freezing and in summer to preserve them.