catena-Poly[[[aqua-copper(II)]-μ-hydroxido-κ2 O:O-μ-[3-(4H-1,2,4-triazol-4-yl)benzoato]-κ2 N 1:N 2] monohydrate].

In the title compound, {[Cu(C9H6N3O2)(OH)(H2O)]·H2O]} n , the Cu2+ cation is situated on a twofold rotation axis and is coordinated by two triazole N atoms from two different 3-(4H-1,2,4-triazol-4-yl)benzoate (3-tba) ligands, by two hydroxyl O atoms and by a water O atom, forming a coordination environment inter-mediate between a square pyramid and a trigonal bipyramid. The Cu2+ ions are connected by 3-tba ligand and a hy-droxy group into polymeric chains parallel to [001]. O-H⋯O hydrogen bonds and C-H⋯O inter-actions consolidate the crystal structure.