This study aims to understand the concentrations of selected heavy metals including arsenic, iron, manganese, cadmium and mercury in groundwater used for domestic purposes in Dak Nong Province of Viet Nam. A total number of 572 groundwater samples including 61 duplicates were collected during October, 2018 – April, 2019. The collected samples were measured onsite for pH and preserved with 2 % HNO3 until pH | Heavy metals contamination in groundwater resource in Dak Nong province Viet Nam