Oil mist is a very harmful pollutant that is primarily emitted by the metalworking industry. The metalworking fluids when cools down, they lubricate the machines and reduces friction, thereby prolonging the life of tools and workpiece. But this fluid is a complex mixture of minerals and synthetic substances that also have contaminants like metal fines, tramp oil and bacteria. Therefore these fluids become airborne and are termed as oil mist. In other words, it is a very common type of air pollutants that cause harm to our environment.