Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI

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Water samples from 30 wells from Remetea Oaşului village (Satu Mare county, Romania) have been characterized by the determination of 2 physical parameters (temperature and electrical conductivity) and of 19 chemicals (the Na, K, Li, Rb, Ca, Mg, Zn, Cu, Fe, Pb, Cd, Cl^–, NO₃^–, NH₄ , SO₄^2– content, pH, total hardness (D,°G), alkalinity (Alk.) and chemical oxygen demand (COD). The chemical composition of the waters shows their suitability for household and agriculture purposes. Among the determined constituents only the Cd, Cu and NO₃^– content exceed the concentration limits for drinking water, being inappropriate for human and animal consumption. The hierarchical cluster analysis shows that the water samples are classified best based on the Pb, Cd, Zn, Cu, COD content, the well waters are grouped in 5 clusters. The waters can be only partially classified; wells from different zones are not separated. Considering the most eight significant variables, they are grouped in two factors, which cover 90.78 % of the total variance.

Keywords: well water, chemical composition, pollution, cluster analysis, factor analysis