In the title compound, C(11)H(11)N(3)O(2)·H(2)O, the planes of the triazole and phenyl rings are almost perpendicular to each other [dihedral angle 89.5 (3)°]. The crystal packing is stabilized by strong inter-molecular O-H⋯O and O-H⋯N hydrogen bonds involving the water mol-ecule as both donor and acceptor.