This paper examines arsenic removal kinetics by applying modified alumina, so as to attain, maximum contamination level (MCL) at faster rate. Y-alumina has been widely used, as an adsorbent to polish off residual arsenic in water following coagulant (Fe3+) treatment. Ferric system mounted over porous Y-alumina shows better efficiency. Adsorption isotherm of the adsorbents, Y-alumina and its modified version indicate that adsorption obeys Freundlich equation. The intensity factor, n of the modified alumina being closer to unity than alumina alone, the rate of adsorption becomes distinctly faster. The adsorption capacity, k(f) which is a measure of heat of adsorption, remains more or less the same, indicating marginal difference only. The superiority of this protocol is established further, as, there shall be no arsenic bearing sludge with its attending disposal problem.