Abstract:
Ground Water is required for all living beings. Without water life is not possible. It is the first requirement of life. Earth is covered by 75% of water and 25% of land surface. But fresh water is only 1% But the source of fresh water is continuouslydepleting. Contamination of ground water is also big problem, There are different types of sources which are responsible for the ground water pollution. It is polluted by solid waste, fertilizers used in crops etc, Water contains many natural occurring substances. Many factorsaffect water quality like bicarbonates, sulphates, sodium, chlorides, calcium, magnesium, and potassium, Substances present in the air affect rainfall. Dust, volcanic gases, and natural gases in the air, such as carbon dioxide, oxygen, and nitrogen, are all dissolved or entrapped in rain. When other substances such as sulphur dioxide, toxic chemicals, or lead are in the air, they are also collected in the rain as it falls to the ground. In opposite cleaning of water have many methods. Water is clean by naturally and artificially. Water is purified in large part by the routine actions of living organisms. Energy from sunlight drives the process of photosynthesis in aquatic plants, which produces oxygen to break down some of the organic material such as plant and animal waste. This decomposition produces the carbon dioxide, nutrients and other substances needed by plants and animals living in the water. The purification cycle continues when these plants and animals die and the bacteria decompose them, providing new generations of organisms with nourishment.
