Amanial Haile Reda
In this study drinking water samples were collected from three sites of Arbaminch town and have been analyzed for some physico-chemical parameters like pH, electrical conductivity (EC), total dissolved solids (TDS), total suspended solids (TSS), total solids (TS), total alkalinity (TA), total hardness (TH), chloride (Cl-) and fluoride (F-). The result showed that pH, EC, TDS, TSS, TS, TA, TH, Cl- and F- ranged from 7.13 to 7.76, 210.0 to 230.5 μScm-1, 134.4 to 147.1 mg/L, 11.22 to 15.44 mg/L, 145.62 to 262.45 mg/L, 88.6 to 182.02 mg/L, 119.2 to 135.11 mg/L, 135.22 to 554.46 mg/L and 2.0 to 4.41 mg/L respectively. All the measured parameters were within the standard drinking water quality values of WHO except Cl- content in AMU sampling site and F- in all sampling sites. The level of Cl- in Secha and Sikela sampling sites were within the standard value of WHO (500 mg/L). But the level of Cl- was found beyond the standard value of WHO in AMU sampling site. Similarly the concentration of F- was found higher than the standard limit value of WHO (1.5 mg/L) in all sampling sites but within the maximum permissible values of US-EPA (4.0 mg/L) except in the AMU sampling site which is a little bit higher than the US-EPA. In general the present investigation found that the maximum parameters were not at a level of pollution.
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