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Water as a chemical:

Pure water is a compound of hydrogen and oxygen. It is colorless, odorless and tasteless. It exists as a liquid at room temperature.

Water - what it contains:

Water has both the living and non-living organisms and substances in it. The living organisms can further be divided into macro-and micro-organisms. Macro-organisms that are biological, are the ones that are visible with the naked eye or to be viewed through a microscope.

In contrast,microbiological organisms are not visible, even through a microscope.

Water quality criteria:

The quality of water is a function of several factors. These include its source, location, geological conditions, the depth of the water level, seasonal changes, domestic activity, agriculture, industrial activity, etc.

Excessive exploitation of natural resources and the use of technological advances, without prejudice to the ecology of air, water and soil;alike.

The substances in the water can be classified as suspended solids and suspended solids. Floating Matter in the form of leaves, twigs, dead organisms and algae. Examples of suspended particles in water, sludge, mud, decaying vegetable matter, bacteria, microorganisms, algae, insoluble iron and manganese.

There is also the dissolved impurities, the gases like carbon dioxide, hydrogen sulfide, etc., as well as chemicals, minerals and includeSalts.

Water sources and water quality:

Water quality is depending on the source. For example, the turbidity in surface water is generally high, while the ground water and underground water in the river beds are colorless and clear. Here, too, are sub-soil and groundwater rather have completely dissolved solids than surface water. The presence of hardness, alkalinity, fluoride, chloride and nitrate in groundwater are all rather than in surface or sub-soil water.Bacteria and organic substances are better than surface water in the soil or sub-soil water to be found.

Water pollution:

Water is essential for life, like air. One can live without air for a few minutes. But without water, you're sure to die within days. We all know about air pollution. Water pollution is also the gift of modern people for posterity.

As water is dirty:

The pollution of water sources caused by human sewage and sullageSettlements deposition of solid wastes, effluents from industrial and agricultural chemicals. When foreign material is harmful to us, the water is safe to get dirty. Two easy as foreign bodies, which are easily come to mind industrial waste and sewage from the cities.

Why do we need good water quality:

We need good water for drinking by humans and animals, support aquatic life, power generation, irrigation of crops in fields and recreation such as water-basedSport.

Hence the need for wastewater treatment can never be overemphasized.

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