Abstract
The focus of this paper is not only on performing laboratory water tests, but also on correlating the obtained results for drinking water samples with the statistical quality control calculations. For this objective various physico-chemical parameters of domestic drinking water were measured, water samples that were collected from Jubail city, mainly from two different areas (Al Huwailat and Jalmudah). The revealed results were correlated with the standard specification (s) outlined by the World Health Organization (WHO). It was found that tested parameters were below the permissible limit stipulated by WHO, which indicates the high quality of water provided in Jubail Industrial City. In addition, the results from the applied research were statistically evaluated by the One-Way analysis of variance (ANOVA) to compare the means of two analysed groups. It was concluded that Ftest for all parameters was less than Fcritical, which proves that difference being analyzed is statistically significant at the confidential level 95%. Statically this leads us to fact that water quality of the studied areas is suitable for domestic purposes.
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