In the title compound, C18H15ClN3O+·Cl−·2H2O, three intramolecular hydrogen bonds are observed, N—H...O, O—H...Cl and O—H...O. In the crystal, molecules are connected by C—H...Cl and N—H...O hydrogen bonds. Strong C—H...Cl, N—H...O, O—H...Cl and O—H...O hydrogen-bonding interactions are implied by the Hirshfeld surface analysis, which indicate that H...H contacts make the largest contribution to the overall crystal packing at 33.0%.