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Peat water source could be found in many lowland and marshy areas in Indonesia such as in Sumatra, Kalimantan, and Papua. This type of water could be a problem for resident living around it as fresh water is one of the basic needs for human being. It formed from decayed of plants, animals, and microbes. The main component of peat water is humic acid which is a complex of organic compound and natural polymer. One of the potential process to treat humic acid is by using photocatalytic degradation method. This research aims to conduct activity of PVDF-TiO2/ZnO/CoO nanofiber photocatalyst for degradation of humic acid solution. Photocatalytic activities was studied inside photoreactor with artificial UV radiation with 254 nm wavelength. The percentage of degradation was determined by measuring humic acid solution before and after degradation using UV-Vis spectrophotometer with maximum lambda in 219 nm. Study of kinetic for photocatalytic reaction was calculated with rate constant 4,29 x 10-5 min-1 ppm-1 and the kinetic of photodegradation on this research was pseudo second order kinetic model.