3-(6-Amino­pyridinium-3-yl)benzoate monohydrate

The title compound, C₁₂H₁₀N₂O₂·H₂O, crystallizes as a zwitterion in which the pyridine N atom is protonated and the carboxyl OH group is deprotonated. The benzene and pyridinium rings are inclined at a dihedral angle of 54.93 (1)°. In the crystal, O—H...O and N—H...O hydrogen bonds link the mol­ecules into a three-dimensional supra­molecular network.