Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are defined as fluorinated substances that contain at least one fully fluorinated methyl or methylene carbon atom. In air filtration applications, PFAS are commonly used to impart water repellency to filter media. However, the carbon and fluorine in PFAS are strongly bonded, so they are not easily decomposed, and furthermore, there are concerns about adverse health effects. In this study, PFAS-free air filter media are developed using a water repellent composed of fluorine-free hydrocarbon-based polymer. The newly developed filter media have the equivalent basic filter media properties (filtration performance, tensile strength, stiffness and water repellency) to the conventional filter media containing a perfluoroalkyl water and oil repellent. On the other hand, their behaviors toward oil droplets are different.