The Quality of Underwater Supplies in Western Romania

Abstract

Over the last three decades, many scientist, national and international agencies were concerned about pollution of the Romanian environment, especially water and its impact on human health. This research includes studies and interpretations resulting from chemical and bacteriological analyzes of water samples collected from wells or underground springs from central north-western part of Romania. The water parameters were determined using standard analytical methods: pH, turbidity, oxidability, ammonium, nitrates, nitrites, chlorides, total hardness, conductivity, mesophilic heterotrophic microorganisms, coliforms, E. coli, intestinal enterococci. Regarding non-compliant samples, the main problem is the bacterial load of water, confirming domestic pollution sources of water. More than 50% of the analyzed samples, which had concentrations of nitrate over 10 mg/L were also found bacteriological inappropria

Seasonal Statistical Analysis on the Quality of Underwater Supplies in South-Eastern Romania

“…Temperature -t ( 0 C), pH (u pH), potential -ε(mV), electrical conductivities -C (µs/cm), total dissolved solids -TDS (mg/L), salinity -SAL (mg/L), dissolved oxygen -DO (mg/L), oxygen saturation -Sat O 2 (%), and gas pressure (mbarr) was determined with instrumental standardized methods [4]. Total hardness, and calcium (Ca 2+ ) was determined with titrimetric methods [5,6] and magnesium (Mg 2+ ) was determined by mathematical equation [7].…”

“…As it is known, TDS correlates positively with conductivity and affects pH [7]. The higher TDS and conductivity and lower the pH towards the acidity [3,6,7].…”

“…The methods of analysis that were used are both chemicals (complexonometr y) and instrumentals (electrochemical with specialized sensors) and there are standardized methods [4,-7]. The quality indicators that Determination of magnesium in the water principle used mathematical calculation and it's based on difference between the amount of reagent used for titration of the amount of cations Ca 2+ and Mg 2+ and the amount of reagent used for titration of the Ca 2+ [7].…”

“…As it is known, TDS correlates positively with conductivity and affects pH [7]. The higher TDS and conductivity and lower the pH towards the acidity [3,6,7]. Worldwide, there are no agencies having scientific data to support that drinking water with low TDS will have adverse health effects [7].…”

“…The higher TDS and conductivity and lower the pH towards the acidity [3,6,7]. Worldwide, there are no agencies having scientific data to support that drinking water with low TDS will have adverse health effects [7]. Due to the reason, we considered for each monitoring point the dependence between pH, calcium concentration and TDS [6,7].…”