The interface electrolyte-charged surface has been captured within the generalized Langevin Poisson-Boltzmann and Langevin-Bikerman models. Here we have modified the latter models to illustrate the importance of the non-zero quadrupole moment of the water molecule within a triangular atomic model. It is shown that the local decrease of relative permittivity of electrolyte solution near the charged surface is further pronounced due to quadrupole moment of the water molecule. The effect is stronger for larger magnitudes of surface charge density. (C) 2013 Elsevier Ltd. All rights reserved.