Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI

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Only 11 % of the population in the rural zone has access to safe drinking water in Romania (2005). Most of human population use wells as the main source of drinking water. The proposed study area of Feleacu is located in the Cluj County, 7.5 km from Cluj-Napoca town. In a review of over 360 tests for 15 private wells done during two years (2007-2008), the most common problems were high levels of iron, nitrate and total dissolved solids (TDS). Wells are generally less than 15 meters deep and they are not properly sealed. Iron concentration ranged from 84 μg/L – 385 μg/L, with 26.66% of samples above the 200 μg/L Romanian drinking water standard. Nitrate concentration ranged from 21 mg/L - 167 mg/L, with 73.33 % above the 50 mg/L Romanian drinking water standard. Groundwater nitrate correlates positively with chloride (R²=0,991) and sodium (R²=0,955). That would suggest that the high content of nitrate may result from the septic tank, the cesspool and the animal wastes storage, located next to the well. Total dissolved solids (TDS) vary between 203 mg/L and 1545 mg/L, with 73.33% above the EPA’s drinking water standards of 500 mg/L. TDS correlates positively with groundwater chloride (R²=0,990), nitrate (R²=0,980), sodium (R²=0,955) and calcium (R²=0,765).

Key words: Well waters, Nitrate in water, Iron in water, Groundwater Quality