There is worldwide consensus today that problems relating to the environment have reached immense proportions and that immediate drastic steps should be taken by nations and the authorized global community to arrest the decline of our environment. The World Health Organization estimates that roughly 25 percent of the disease burden in the developing world is due to environmental factors. For this paper Environmental Human Development Index (EHDI) has been measured, which is a modified version of Human Development Index (HDI) in the pursuit of Conceptualizing a Sustainable Human Development Index in a Globalized World by Evidence from Assam and Meghalaya. This study is based on secondary data obtained from multiple sources. These are like- Census 2011, Central Pollution Control Board, India stat, World Bank, etc. The paper concludes with policy implications for the topic at hand. This study tries to search for development situation regarding the environmental condition of two sister states of North East India. After including the ecological parameters and household status, the shape of the development index is changing. Both states are increasing the development index value. But here Meghalaya increased its development value more than the state Assam. This study portrays with increasing environmental pollutants of particular state morbidity, especially cardiac diseases are growing.