This paper explains the use of ultrafiltration and microfiltration membranes in the treatment of drinking water. The basic types of ultrafiltration and microfiltration membranes, their characteristics, and the most important manufacturers of membranes for ultrafiltration and microfiltration are listed. Membrane filtration due to its advantages such as quality of treated water, the simplicity of the process, reduced use of chemicals, is replacing the now dominant technologies such as flocculation and ion exchange. Number of membrane treatment plants is constantly growing, so it can be said that they represent the future of membrane processes in water treatment.