Water of good standard is needed for human life and is used for industrial, agriculture, domestic and commercial uses. All these activities are also answerable for polluting the water. Fluorosis is a disease caused by excessive ingestion of fluoride through water and food. The problem of excess fluoride in drinking water is a recent case in Tamil Nadu. The initial amount of fluoride in the sample water was found to (Ci) 3.52×10-4g / 100ml. The effect of individual adsorbent dose was studied and the percentage of fluoride removed was found to increase with increase in adsorbent dose. These may be due to the increase in surface area. The boiled samples were found to be better when compare to unboiled adsorbent. Similarly, shells heated at higher temperature where found to be more effective. Adsorption isotherm of sample Adsorbents were studied to calculate adsorption efficiency of adsorbent systemThe Freundlich adsorption isotherm was based on heterogeneity of the surface for fluoride removal. Based on the adsorption isotherm, shell of A.marmelos is capable of adsorbing fluoride from water. In this present study, fluoride is removed from waste water by using activated charcoal of Aegle marmelos fruit’s shell.