Abstract

Oran is relatively a city with the worst quality of the water. Recently, the growing populations may put stress on natural waters by impairing the quality of the water. Unfortunately, certain stretches of the watershed are polluted. It has scarce physicchemical data on its water resources that could assist in making robust decision in mitigating the impact of human societies on natural waters; which may not only preserve natural areas, but improve the quality of life of her growing population. In an attempt to study the environmental impact on water quality, an investigation was carried out to monitor the water quality over a period from 04 to 20 July 2011. So fifty samples were collected and analyzed. The water physico-chemistry prior was consistent with that of researches done previously in that area. The average value of different parameters are: pH 6.8, electric conductivity 6,06 (dS/m), chloride 1780 (mg/l), sodium 1811(mg/l), sulfate 631 (mg/l), nitrate 27 (mg/l), magnesium 177 (mg/l), calcium 321 (mg/l) and bicarbonate 327(mg/l). Higher values of the physical-chemical parameters of water obtained in the present study sites indicate that the results obtained fell within the maximum allowable limit set by the World Health Organization for drinking water.