This book “Assessment of heavy metals (Co, Ni & Pb) in soils of Jharkhand” is the outcome of seven years research experience in soil science. This book has been written for Jharkhand, a state known for natural resources and industries. Jharkhand, the newly born State of India (Born on 15th November, 2000), is comprising of three agro-climatic zones viz. Central and north-eastern plateau, Western plateau and South eastern plateau. The state is popularly known for its coal mines, industries and metalliferous ores. Out of the several sources, industrial effluents, sewage and mines are major sources of heavy metals. In the rapid pace of development we have inflicted serious damage to the natural resources and consequently we are now faced with questions as where is that Sujalam (clean water)? Where is that Suphalam (healthy crop)? And where is that malayaja shitalam (refreshing air)? These questions have given rise to a process of serious thinking to safeguard the environment and the quality of natural resources for sustainability. Thus, the knowledge and information about the heavy metals (Co, Ni & Pb) is essential.