The inorganic compositions of three (Ambo, Aquaddis and Highland) brands of bottledrnmineral water and tap water samples from different sources that are consumed in AddisrnAbaba (Ethiopia) were analyzed using standard methods. FAAS was used for therndetermination of four heavy metals (Fe, Cr, Cd and Zn); Cd and Cr were not detected inrnall samples. Ion chromatography was used for the determination of common cations (Na+,rnK+, Ca2+, and Mg2+) and common anions (F-, Cl-, Br-, NO3rn-, SO4rn2-and PO4rn3-) in the bottledrnmineral water and tap water samples. Common cations were found to be higher in Ambornmineral water than other two mineral water samples, some of the anions were notrndetected in some of the mineral water samples; phosphate was not detected at all. Therncomposition of the mineral waters was also compared with that of the tap water. Fe andrnZn were higher concentration in tap water as compared to mineral waters and the reversernwas true in the case of common cations and anions. Some brands of bottled mineral waterrnwith respect to some of the analytes were found not to comply with internationalrnguidelines for drinking water and may not be suitable for babies and people sufferingrnfrom heart or kidney diseases. Some physical parameters, pH and electric conductivity ofrneach water sample were determined; pH in some samples found to be below the lowerrnlimit of WHO guideline.rnKeywords: FAAS, IC, Bottled mineral water, Heavy metals, Common cations andrnanions, Physical parameters