The occurrence of objectionable tastes and odors in drinking water is a common and widespread program. The most troublesome odors are usually those described as muddy or earthy-musty. Two organic compounds which have been implicated as the cause of earthy-musty odor problems in water are geosmin and 2-Methylisoborncol. These earthy-musty organics have been shown to be metabolites of actinomycetes and blue green algae. The purpose of this paper is to describe adsorbability in removing these two odor causing compounds(geosmin and 2-MIB) upon various condition like pH variation, adding humic acid and different activated carbon. The conclusion of this study are as followings. In batch test, carbon dosage is 10㎎/100㎖ for geosmin and 15㎎/100㎖ for 2-MIB. Both were in equilibrium stage after 60 hours. In model simulation, F-P model described experiment data and modelling data appropriately in geosmin but F-S model not. In case of 2-MIB, models didn’t describe relation between experiment and modeling data well. Two causative agents of earthy-musty odor compounds, geosmin and 2-MIB, are strongly adsorbed by activated carbon either coconut or brown. There appears to be no effect of pH(5, 7, 9) on adsorption of these two organics. Activated carbon proved to be more effective for removing geosmin than for removing 2-MIB. When activated carbon is used in removing these two organics, the removal of these appeared to be adversely affected by back ground organic compounds, such at humic substances, due to competitive adsorption.