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A Gram-stain-negative, pinkish-red, rod-shaped bacterium designated strain NKM1(T) was isolated from soil samples contaminated with hexachlorocyclohexane isomers, collected from Ummari village, Lucknow, Uttar Pradesh, India. The strain was characterized by a polyphasic taxonomic approach. 16S rRNA gene sequence analysis showed that strain NKM1(T) clustered exclusively with members of the genus Pontibacter of the family Cytophagaceae, phylum Bacteroidetes. The 16S rRNA gene sequence similarity to type strains of the genus Pontibacter ranged from 96.7 to 93.8 %, with the highest sequence similarity found with Pontibacter odishensis JC130(T) (96.7 %). Cells of strain NKM1(T) were aerobic, non-flagellated and non-motile. Strain NKM1(T) was catalase-and oxidase-positive but negative for nitrate reduction and hydrolysis of gelatin. The major fatty acids in strain NKM1(T) were anteiso-C-15 : 0, iso-C-15 : 0, C-16 : 0, C-18 : 1 omega 9c and summed feature 3 (C-16 : 1 omega 7c and/or C-16 : 1 omega 6c). The polar lipid profile of strain NKM1(T) showed the presence of phosphatidylethanolamine and unknown glycolipids as well as aminolipids. sym-Homospermidine was found to be the major polyamine and menaquinone 7 (MK-7) was the major respiratory quinone. The DNA G+C content of strain NKM1(T) was determined to be 58.6 mol%. Based on phenotypic, chemotaxonomic, physiological and biochemical evidence, it is proposed that isolate NKM1(T) represents a novel species that belongs to the genus Pontibacter, for which the name Pontibacter ummariensis sp. nov. is proposed. The type strain is NKM1(T) (=DSM 100161(T)=KCTC 42944(T)=MCC 2777(T)).