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Iron and manganese were two elements which are abundantly found in groundwater. Oxidization and filtration processes have been applied to remove iron and manganese from waters. These elements are present as the divalent ferrous iron, Fe+2, and the divalent manganeous manganese ion, Mn+2 in ground waters due to its high carbon dioxide and low dissolved oxygen concentration. Soluble ferrous and manganous are oxidized to form insoluble (Fe+3 and Mn+4 valence) and then oxidized iron and manganese are filtrated to separate from waters. Different filter materials like sand, manganese green sand, anthrasand, pyrolusite have been used in filtration process. In this study, pumice stone was investigated to usable as a filtration material for iron and manganese which are found both soluble and insoluble form from waters. Two pumice types were utilized to remove iron and manganese by using filtration process. First pumice type is pure pumice which wasn't subjected to process, and second type is coated pumice which covers with MnO2(s) layer. Different iron and manganese concentrations was applied pumice filters which prepared by using pure and coated pumice. In experimental studies done by using pure pumice, it was observed that iron removal efficiency changed range from 80-86 % by increasing concentrations of iron solutions; manganese removal efficiency was 62-81% by increasing concentrations of manganese solutions. Iron removal efficiency changed range from 81-84 %, whereas manganese removal efficiency increased up to 250 mg/L manganese concentration in filter system which uses coated pumice. Manganese removal efficiency changed range from 12-87 % at all manganese concentrations was observed. When low ferrous iron concentration (12.5 mg/L) solutions applied to filter systems, iron removal was approximately equal both coated pumice and pure pumice. In addition, iron removal efficiency was stable during filtration process with coated pumice was determined. [ABSTRACT FROM AUTHOR]