The used of low cost and ecofriendly adsorbent has been investigated as an alternative to the current expensive method of removing dyes from wasterwater. Cow dung cakes collected from the nearby village which was burnt in a muffle furnace at 500 ℃ to obtain the required ash. this paper deals with the removal of Reactive Blue 221, Acidoll Yellow 2GNL and Olive BGL which are mainiy used in tetile industry, from aqueous solution by cow dung ash without any pretreatment.