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In the title compound, [Mn(C8H2NO6)(H2O)2]n, each pyridine-2,4,6-tricarboxylate (tpc) ligand bridges two MnII ions with the formation of polymeric chains located on a twofold rotation axis. Each MnII ion is coordinated by two O and one N atoms from one tpc ligand, two O atoms from another ligand and two water molecules in a distorted pentagonal–bipyramidal geometry. The Mn—N [2.243 (2) Å] and Mn—O [2.206 (2)–2.3123 (16) Å] bond lengths are normal. The coordinated water molecules link neighbouring polymeric chains via O—H...O hydrogen bonds into a two-dimensional framework parallel to the bc plane.