The main objective of this research is to investigate the possibility of using vacuum ultraviolet (VUV) for the removal of haloacetonitriles (HANs), as emerging nitrogenous disinfection by-products (N-DBPs) in water. Three difference HANs species, i.e., monochloroacetonitrile (MCAN), dichloroacetonitrile (DCAN), and dibromoacetonitrile (DBAN) were selected for degradation studies. The effects of operating parameters including solution pH and dissolved oxygen (DO) were investigated. Among the pH tested (7, 8 and 9), the removal efficiency of each HANs were not difference. This implying that pHs 7 to 9 did not have significant effect on the removal of three HANs by VUV process. It was also observed that the introduction of saturated DO did not enhance the degradation efficiency due to the block of the light from the bubble. After 120 min of VUV irradiation (60 watts), about 70% of MCAN and 90% of DCAN were removed. Significantly, DBAN was completely removed within 20 min. When compare the result of three compounds, DBAN was removed faster than mono-, and di-chlorinated HANs. This may be due to replacing chlorine with bromine increased the photolytic degradation of HANs.