Reverse osmosis (RO) is a latest and advanced water decontamination technology that uses a semipermeable crust to eradicate molecules, ions, dust elements from drinking aqua. It is also the most economical procedure for the purification of brackish aqua and seawater. In reverse osmosis, an applied pressure is extremely used to overcome osmotic pressure, a joint property, which is driven by chemical potential differences of the solvent, a thermodynamic parameter. In addition, RO can easily eliminate several types of liquefied and suspended species from water, containing bacteria, and is largely used in both industrial procedures as well as the production of drinkable water. The outcome is that the solute is keeping hold off on the forced side of the membrane and the uncontaminated solvent is permissible to pass to the other side. To be selective, this membrane should not permit big molecules or ions through the pores (holes) but should permit lesser components of the solution (like solvent molecules) to pass effortlessly.