Agricultural production from the deltaic regions is the highest in countries like India. Study of groundwater quality, which is a function of physical and chemical parameters of the geological formations, is important as it will affect the agricultural production. The present study was carried out with the objective of determining the seasonal and spatial variation in the concentration of Mg and Cl ions in groundwater of this region over the period of 6 months during 2006-2007. Groundwater samples were collected from 42 wells located in months during 2006-2007.