In the asymmetric unit of the title compound, 2C(7)H(9)ClN+center dot C9H6O4 2-center dot 2H(2)O, there are two crystallographically independent cations, one dianion and two water molecules. The dihedral angle between the two carboxylate groups of the dianion is 78.1 (2)degrees. In the crystal, the components are held together by N-H...O, O-H...O and C-H...O hydrogen bonds, forming a layer parallel to the bc plane, with the hydrophilic and hydrophobic groups located in the inner and outer regions of the layers, respectively.