Chemical Studies on the Water Quality in Tabuk City, Saudi Arabia

Abstract The water quality was studied for selected samples from groundwater and network water-supply. The values of NH3, NO3, pH, TDS, alkalinity, hardness, Pb, Cd, Fe3+ and Mn2+ were estimated. Ammonia values ranged between 0.07-0.7 ppm. Nitrate values ranged between 2.4 and 0.35 ppm. The TDS was between 645 ppm and 480 ppm. For Fe3+ and Mn2+ the values are below the limits of WHO except for well 9; and manganese in wells 6-10. Several wells showed values of Cd above the Saudi STD. The network water-supply in Tabuk city was investigated. The TDS values for these samples were between 500-600 ppm. The hardness values exceed the Saudi STD limit. When ammonia was tested, only one sample showed high value. Chloride level was below 158 ppm, but sulfate values for most samples were 128-222 ppm. For iron only one sample (well no. 9) was above the permissible limit.

Keywords water quality, Tabuk city, groundwater, network water-supply, heavy metal levels.

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