المجلة الدولية للعلوم والتقنية

This study was conducted in the Zawaga area, located 3 km west of the city of Sabratha, and the study aimed to know the effect of the untreated sewage water accumulated in the collection basin of the sewage treatment plant in the study area. The aforementioned chemical and bacteriological aspects. To accomplish this work, samples were taken from (28) wells surrounding the station, at distances ranging from (350 meters) up to (5 km). The study showed that the levels of positive ions (sodium, potassium, magnesium, and calcium) and negative ions (chloride, sulfate, nitrate, nitrite, ammonia and bicarbonate) exceeded the permitted limits according to the Libyan and international standards, except for potassium and nitrate. As for reading the results of the BOD analysis, it did not exceed the permissible limits in all samples, but it exceeded the optimal limits (zero). The bacterial analysis showed that all samples were bacterial contaminated, meaning that they are not suitable for drinking. Keywords: sewage water, Zawagha area, ground water, positive ions, bacterial analysis