[01] Hafiza Umaira Shams, Department of Environmental Sciences, Northern University, Nowshera, KPK, Pakistan. [02] Jamila Begum, Department of Environmental Sciences, Northern University, Nowshera, KPK, Pakistan. [03] Arshad Ali, Civil Engineering Wing, MCE, National University of Sciences and Technology, Islamabad, Pakistan.

Different water samples from the various water sources of Armour Colony Nowshera District were collected at regular interval for a period of 4-6 months. The samples were analyzed by using standard laboratory techniques as per available standards. The main objectives of the study were to investigate the water quality of the area and to determine the optimum coagulant dosage for the removal of excessive microbial contamination. The results obtained from the tests indicate that the water quality in most parts of the subject area is polluted in one way or the other. The main pollution identified is high turbid microbial contaminated water. The lime, alum and magnesium sulfates were used a coagulant dosage during this study. The optimum turbidity and microbial contamination by using lime dosage of 16mg/L were observed as 9.50% and 10%, respectively. The total estimated cost of lime required per day for the water treatment flowing at the rate of 5.0GPD was calculated to be 0.42USD.

Drinking Water, Microbial Contamination, Coagulants, Dosage

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