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A total of 80 water samples were collected from several private wells (Sita Buzăului village - Covasna County) and public springs (Vatra Dornei area - Suceava County), during five sampling campaigns (November 2016, January - April 2017). The wells had a higher content of dissolved ions than the springs, while nickel was slightly higher in springs than in wells, due to the more acidic pH. The levels of the analyzed parameters were lower during January and February 2017 than in March 2017. Based on the water quality index, 75% of the investigated water sources can be classified as excellent quality status, 19% correspond to good status, while 6% have a poor water quality. [ABSTRACT FROM AUTHOR]

The present paper is a study of the water quality sampled from Brăteni Lake and the streams near the lake. The analysis targets the microbiology via DNA extraction, PCR and sequencing of DNA fragments and the chemistry through nitrate and ammonium determination. For the quantification of bacteria present in water samples, 3 culture media were used: R2A for oligotrophic microorganisms, Standard I as a complete medium and Burks for nitrogen fixing bacteria enrichment. The identified bacteria included, Pedobacter, Streptomyces, Bacillus, Flavobacterium and Sphingobacterium. Nitrate and ammonium had higher concentrations in one of the streams near the lake. The results highlighted a close link between land use and lake water quality, agricultural activity having a strong influence on water quality. [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]

The ingestion of high levels of heavy metals through drinking water intake can lead to chronic diseases such as renal failure, liver cirrhosis and chronic anemia. The present study evaluates the lead content in thirteen private wells from four rural areas located in Baia Mare (NW Romania) metropolitan area. Based on the lead concentration, the daily intake rate of Pb was calculated for the female, male and children who use these water sources as drinking water supplies. The daily ingestion rate of lead due to water consumption was considerably higher for the inhabitants from Tăuţii de Sus (0.05 - 0.21 μg/day/person) than for the inhabitants from the other villages (<0.08 μg/day/person). [ABSTRACT FROM AUTHOR]