Water Treatment is one of the process by which the unwanted particles present in water, contaminants from waste water and pollutants are removed. This process is carried out in a plant that is well known as water treatment plant. There are several new inventions or modern technologies are available used in water treatment plant. Some of them include Reverse Osmosis (RO), Ultrafiltration (UF), Microfiltration (MF), Nanofiltration (NF), etc. These are some of most helpful processes or technologies.