GROUND WATER QUALITY OF DOMESTIC WELLS IN CAJVANA TOWN

Dinu Iulian OPREA-GANCEVICI, Cătălin SAVU

Abstract

The purpose of this paper is to analyze the water quality in some wells of Cajvana town, uniformly distributed in the built area. The water quality is analysed for the following parameters: NH4+-N, NO2--N, NO3--N, P- PO43- and S2-. A Hach–Lange spectrofotometer was used in order to analyze the chosen parameters of the water samples collected in August 28th, 2015 (the chosen time is random, for expeditionary measurements purposes). The measured values were converted into interpolation maps of the quality classes of each monitored parameter. Consistent above average (of the built area) concentrations of ammonium and nitrite near the main graveyard of the settlement caused by the decaying organic matter were measured. Nitrite pollution is stronger along Cajvana valley. Nitrate pollution has values above average in the western half of the town. Orthophosphate pollution, caused by domestic wastewaters, has high values in the central part of Cajvana. The water pollution by sulfides is almost absent. The worst quality class recorded for each parameter is: very good for ammonium, average for nitrite and mediocre for nitrate and orthophosphate. The increasing standard of living and human pressure on the environment will most probably cause increased groundwater pollution in the near future if a proper sewerage will not be implemented.

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