Selecting low ash low sulphur bituminous ,adopting agglomeration process and well-controlled steam activation. The activated carbons display good hardness and high internal surface area , thus effectively adsorb the organic pollutants with large and small molecules and remove the taste and odor compounds and bear repeated backwashing and resist the abrasion. The granular activated carbons functioned as both filtration and adsorption mainly treat the surface and ground water source and produce the clean drinking water.