Assessment of Drinking Water Qualtiy of Kosti City, Sudan

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Siddig, Sarra Mohamed
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University of khartoum
This study was done to investigate the drinking water quality of Kosti city distributed via the pipeline of water network network during the period August 2004 to July 2005. Six sites of Kosti city water network were selected comprising raw water, inside the plant, Elnusri area, El Mirabea, 27 area, El Hilla Elgadida and Elshati. Two hundred and sixteen samples were collected during the period August 2004 – June 2005. Three samples were monthly collected from each site to evaluate each parameter examined in this study. Samples were subjected to physical, chemical and micro-biological examination and analyzed to investigate the level of the expected health hazards in each sample. The data obtained were subjected to statistical analysis. The iodine values were estimated to demonstrate the iodine deficiency and probably the peculiarly elevated prevalence of endemic goiter in Kosti city. The results obtained were compared with international and national drinking water guidelines in an attempt to evaluate the quality of drinking water in Kosti city. The results obtained indicated that the turbidity level ranged from (10.5 - 625.0) thus exceeding the permissible level of WHO (1993) standards (5 NTU). The concentration of minerals such as chloride ranged from (6.6 - 10.6 mg/L), sulphate (8.0 - 14.0. mg/L), calcium (9.6 - 23.0 mg/L), alkalinity (61.7 - 87.5 mg/L), fluoride (0.28 - 0.49 mg/L), magnesium (3.2 - 7.0 mg/L), ammonia (0.01 - 0.023 mg/L), TDS (80.75 - 125.1) and hardness (34.33 - 82.23 mg/L). The iodine content ranged from (0.06- 0.2 mg/L). All these values fall below thresholds value of national and international standards of WHO and Sudanese Standards and Metrology Organization (SSMO) standards. The study revealed that raw water of Kosti city was polluted by coliform and the results do not cope with international (WHO, 1993) and the national Sudanese Standards Metrology Organization (SSMO, 2002). After treatments of raw water the pollution incidence in tap water samples was decreased, however, slight pollution occurs in some of the treated water samples. It may be stated that most of the tap water samples collected from the main distribution network are, suitable for human consumption. A number of recommendations were suggested to improve the drinking water quality.
96 Pages
Water Qualtiy;Water sources ; supply;Electrical conductivity;Water borne diseases;dissolved solids;Coliform bacteria;natural degradation
University of khartoum