Poly[[[[1-ethyl-6,8-difluoro-7-(3-methyl­piperazin-1-yl)-4-oxo-1,4-dihydro­quinoline-3-carboxyl­ato]cadmium]-μ-benzene-1,4-dicarboxyl­ato] trihydrate]

In the title layered coordination polymer, {[Cd(C(17)H(18)F(2)N(3)O(3))(C(8)H(4)O(4))]·3H(2)O}(n), the Cd(II) atom exhibits a very distorted CdO(6) octa­hedral geometry defined by one O (3),O (4)-bidentate 1-ethyl-6,8-difluoro-7-(3-methyl­piperazin-1-yl)-4-oxo-1,4-dihydro­quinoline-3-carboxyl­ate (lome) ligand, one O,O′-bidentate benzene-1,4-dicarboxyl­ate (bdc) dianion and two O-monodentate bdc dianions. Both the bdc species in the asymmetric unit are completed by crystallographic inversion symmetry. The bridging bdc dianions link the cadmium nodes into a recta­ngular grid lying parallel to (01[Image: see text]). A network of N—H⋯O and O—H⋯O hydrogen bonds helps to establish the packing.