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Baia Mare region is one of the most polluted areas from our country due to extraction and processing of ores with high content of Cd, Cu, Pb, Zn and precious metals. The main objectives of the present study were: to assess the groundwater quality by determine the physico-chemical parameters values, dissolved ions and heavy metal concentration and to evaluate if those groundwater sources can be used for irrigation and drinking purposes by calculating 10 specific quality indexes. A total of 70 groundwater samples were collected from 14 private wells and springs from Baia Mare and surrounding areas (November 2013 and December 2013, June 2014, September 2014 and December 2014). In situ a portable multiparameter WTW Inolab 320i respectively a portable turbidimeter were used to determine the physico-chemical parameters like: pH, ORP, EC, TDS, DO, salinity and turbidity. The dissolved ions (Li+, Na+, NH4+, K+, Mg2+, Ca2+, F-, Cl-, Br-, NO2-, NO3-, PO43-, SO42-) were analysed in laboratory by using an ion chromatograph IC DIONEX 1500. An atomic absorption spectrometer ZEENIT 700 was used to determine the heavy metals concentrations like: Cd, Fe, Mn, Ni, Pb and Zn. After calculating the specific quality indexes (WQI, MI, HPI, PI, SAR, % Na, SSP, MH, MR and KR), the obtained results indicated that the majority of the investigated water sources are not recommended for drinking and most of them are suitable to be used only like irrigation waters. [ABSTRACT FROM AUTHOR]

The purpose of the present research was to assess the ground water quality from nine private wells from Tarna Mare commune located in Satu Mare County. Tarna Mare the northernmost commune of Satu Mare County, it has a population of 3.774 inhabitants and a total surface of 44 km2. The commune is located along the Tarna Valley at the foothills of Oas Mountains. Tarna Mare background is rich in complex ores of non-ferrous metals (copper, lead, zinc, gold and silver). In order to evaluate the water quality, several physico-chemical parameters (pH, redox potential, total dissolved solids, electrical conductivity and salinity) were investigated. The samples were collected in October, November, December 2015 and January 2016. The results showed that the waters were acidic having the pH between 4.7 and 7.52, considerably lower than the limit imposed by national legislation (between 6.5 and 9.5). The investigated wells proved to have a relatively high contented of dissolved salts, having the electrical conductivity between 83.6 μS/cm and 908 μS/cm and the salinity between 0 and 0.4 ‰. Regarding the cations concentrations (mg / L) those ranged between: 21.55 - 318.19 for Na+, 16.42 - 556.43 for Ca2+, 5.27 - 149.48 for Mg2+ and 5.7 - 481.83 for K+. Li+ and NH4 + were not detected in analyzed samples. [ABSTRACT FROM AUTHOR]

The aim of the present study was to determinate the groundwater quality from 17 wells, 3 natural springs and 3 samples from a local distribution network. The samples were taken from Nadas village, located in Crisul Repede village, Cluj County. The area has a topography that consists in a valley surrounded by hills (500 - 700 meters high). The main objective was to investigate physico-chemical parameters: pH, TDS, ORP, salinity and heavy metals (Cu, Cd, Cr, Pb, Fe, Zn and Ni). Laboratory analyzes revealed that the waters sampled from well 7 exceeded the permissible limit imposed by US-EPA for TDS value (500 mg/L), wells 4 exceeded the salinity value imposed by US-EPA (0.2 ?), one well had a pH close to permissible limit (9.5), ORP had negative values (between -6.9 and - 143.5 mV), while the heavy metal content varied significantly, depending on the water sources and heavy metal type. Copper and cadmium were not detected in the analyzed water samples, but chromium had values between 1.36 - 40.21 µg/L, zinc between 11.19 -437.6 µg/L, iron increased levels in the wells samples from 10.77 µg/L to 99.90 µg/L, lead was identified in four wells (4.93 - 51.1 µg/L) and nickel ranged between 4.94 - 39.61 µg/L. Were registered significant differences between the water samples collected from wells, natural springs and water samples from the local distribution network. [ABSTRACT FROM AUTHOR]

This paper presents a comprehensive study regarding the pollution of the groundwater, in a rural area. Drinking water samples have been collected from ten wells from Cotu-Vameş village, Neamţ County for two years (2011 and 2013). These drinking water samples were analyzed for pH, electrical conductivity (EC), total dissolved solids (TDS), ammonium (NH4+), nitrite (NO2-), nitrate (NO3-), chloride (Cl-), color, smell, oxidability, turbidity, coliform bacteria, Escherichia coli, enterococci and total number of germs. Three of the wells had a large number of coliform bacteria over the maximum permissible values according to the Romanian legislation for drinking water (LAW 311/2004; 458/2002). Water quality index (WQI) was calculated in order to evaluate the overall quality of groundwater and its values ranged between 22 (excellent quality) and 84 (very poor quality). [ABSTRACT FROM AUTHOR]

The rural population from Romania is dealing even today with the absence of access to a sure drinking water source. Therefore in 2002 only 65% of the Romanian population had access to drinking water, distributed in 90% from the urban environment and 33% from the rural one (www.recensamant2002.ro). This work presents a case study referring to a 3 month (April-May-June 2011) monitoring of weekly samples of the quality of well water (10 samples) from Tureni village, Cluj County. A portable multiparameter model WTW 720 Germany was used to measure the pH, total dissolved solids (TDS), electrical conductivity (EC), temperature, oxidation-reduction potential and salinity of the collected water samples (these tests were done on site). In laboratory, using the photometric method (RQ Flex instrument, Merck) we determined : Ca2+, Mg2+, SO42-, Cl- and NO3- (C. Nertan et C. Rosu, 2008). The analyzed well water samples have values over the legally admitted limits by the Romanian legislation for the drinking waters (L 458/2002) in the calcium cation, the nitrate and sulfate anion, but also in the global parameters: salinity and TDS . [ABSTRACT FROM AUTHOR]