ABSTRACT: in recent years, high quality fresh water source becomes insufficient. Thus, sources of drinking and using water is became international commercial trade value. Manyfresh and mineral water springs are located in the Değirmendere basin. Değirmendere alluviums that were provided drinking water of Trabzon before the Esiroğlu cleaning and refining facilities become providing water, alsofound in the basin. The goal of current study is determination of auality, and quantity of fresh and mineral water , lources, and development basic knowledge about appropriate sourcesfor later investment. Surface, groundwaters and mineral yvaters of the Değirmendere basin have been investigated and hydrochemical properties have been determined. They were evaluated according to Turkish Standartsfor water and the Polluted Water Control Statement. According to hydrochemical properties ofstreams, spring and mineral waters in the Değirmendere basin, the dominant ions in waters are Ca+2 and HC03_, and all waters are classifıed as "calcium bicarbonate water". Mineral saturation index of the waters are calculated, and they are generally classifıed as unsaturated waters. Hoywever, mineral spring waters are saturated with calcite and dolomite. Groundyvaters are not saturated except a few well water saturated with calcite and aragonite. Representative water samples of the basin were analyzedfor some inorganic elements. Obtained data indicated that Sb and Se contents of the Yanlıca mineral water, and Cr and Pb contents the Akoluk mineral water are above the limits representing the Değirmendere equifer and the Kendirli aquifer`s water is also above the limits. According to pH, TDS, CT and S04-2 value, surface waters are high auality. But according to N02 value Sümela stream water is high auality, Meryemana, Maçka and Galyan streams waters are contaminated water, Değirmendere water is higly contaminated water quality. According to pH, TDS, Cl, SO42, NO 2 and N02 values groundwater of the Değirmendere basins are classifıed as high auality water.