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The Rrogozhina Aquifer extending over the Pre-Adriatic Depression of Albania occurs under typically artesian conditions. The aquifer is hosted in Pliocene molasse formations and contains groundwater that mostly belongs to the HCO3-Mg-Ca type. High FeO content (ranging from 0.2 to 2.5 wt.%) characterizes the groundwater. The prevalence of ferrous iron is due to the lack of oxygen and the long underground residence time. Heavy minerals such as magnetite, epidote, garnet, titanite, amphibole, and pyroxene in the silt fraction of the sandstones might be responsible for the high Fe content in the groundwater.

Key words: Groundwater, Rrogozhina Aquifer, iron, mineralogical composition, Albania.