Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids and gases from contaminated water. The goal of this process is to produce water fit for a specific purpose.
The purification process of water may reduce the concentration of particulate matter including suspended particles, iron, hardness, chlorine, pesticides, industrial chemical, parasites, bacteria, algae, fungi, and a range of dissolved and particulate material derived from the surfaces that water may have made contact with after falling as rain.
It is not possible to tell whether water is of an appropriate quality by visual examination. Simple procedures such as boiling or the use of a household activated carbon filter are not sufficient for treating all the possible contaminants that may be present in the raw water.
The purpose of filtration is to remove suspended particles from water by passing the water through different types mediums. As the water passes through the filter, floc and impurities get stuck in the mediums and the clean water goes through. The filtered water collects in the overhead tank.
In the treatment plant, up to 99.5% of the impurities in the water can be removed, including sediments, iron, hardness, minerals, floc, and microorganisms.