Summary Although the production and use of technical hexachlorocyclohexane ( HCH ) and lindane (the purified insecticidal isomer γ‐ HCH ) are prohibited in most countries, residual concentrations still constitute an immense environmental burden. Many studies describe the mineralization of γ‐ HCH by bacterial strains under aerobic conditions. However, the metabolic fate of the other HCH isomers is not well known. In this study,...