Water treatment could be defined as a process that makes water that is available to us to be made more acceptable to the user who wants use the water. The end use of water could be as drinking water, for use in different industrial processes, for medical use, for irrigation and a large number of other uses. Any would involve removal all types of material contaminating water and reduce their concentration to acceptable limits so that the water after treatment would be suitable for desired end use. We can think of one end use of returning the water to natural environment after its use so that the ecological balance does not get disturbed. Of all the water treatment jobs, water purification could be considered the most important of them all. Therefore, we would be looking into it in greater detail.

Water purification is a process that removes chemicals that poses danger to our health and are not all desirable. The process also removes biological pollutants from water. The ultimate aim of any water purification process is to make water to conform to certain standards. The process of water purification is carried out to make water suitable for human consumption. Besides this use, water purification is carried out to meet the requirements for medical, pharmaceutical, industrial and chemical application. Water purification process could be broadly divided into a number of parts. The first part deals with physical processes like filtration and sedimentation, whereas the second part involves biological processes like slow sand filters or activated sludge process. Water purification also involves chemical processes like flocculation and chlorination while electromagnetic radiation like ultraviolet light is also used in the process.

The process of water purification leads to the reduction in concentration of particulate like suspended substances, bacteria, virus, parasites, algae, fungi and many other dissolved chemicals as well as solid materials.

According to a World Health Organization report, billions of people mainly in less developed countries still have no access to the supply of safe drinking water. This is the main cause of the occurrence of billions of diarrhea causes each year. The supply of unsafe water is one of the major cause of child death in these countries.

From this discussion, you could easily understand the importance of water treatment jobs in our daily life and it should be considered as an emerging career options for the future.