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In the title polymeric complex, {[Cu(C14H14N2O6)(C3H4N2)2(H2O)]·2H2O}n, the CuII cation, located on a twofold rotation axis, is coordinated by one water molecule and two imidazole molecules as well as two symmetry-related 3-([4-[(2-carboxylatoethyl)carbamoyl]phenyl]formamido)propanoate dianions (L2−) in an approximately square-pyramidal geometry. The coordinating water molecule is located on a twofold rotation axis while the L2− anion sits about an inversion center. The L2− anions bridge the CuII cations, forming polymeric chains propagating along the [101] direction. In the crystal, O—H...O, N—H...O hydrogen bonds and weak C—H...π interaction link the polymeric chains and the solvent water molecules into a three-dimensional supramolecular architecture.