A local HNC/HNC approximation is proposed and applied to 2:2 electrolytes near a charged hard wall. The results are compared with Monte Carlo data and other theories such as HNC/HNC, HNC/MSA, BGY, and MPB5. A remarkable improvement of the density profiles and of the diffuse layer potential is obtained. We show that the HNC closure for the ion-ion correlations, when used in the local scheme, always gives better results than those obtained from the MSA closure. The necessary algorithm for solving the local HNC/HNC equations is also presented. © 1986 American Institute of Physics.