Organochlorine pesticides in sediments of Laizhou Bay and its adjacent rivers, North China

► Levels of OCPs in sediments of Laizhou Bay and nearly ten rivers flowing into the bay were investigated. ► Laizhou Bay showed the lowest level of HCHs among the three main bays of Bohai Sea. ► Fresh input of Lindane only existed in several riverine sites and dicofol type DDT in a site located in an industrial park. ► Riverine runoff is a weak source of OCPs in Laizhou Bay in recent years.