Quality Assessment of Ground Water Collected From the Libyan Areas (Grapolly And Gasir Alakhiar Regions)

Six underground wells water samples were collected, three from Grapolly region and another three from Gasir Alakhiar region. The following tests were performed to them : pH number , electrical conductivity , total hardness , chloride content , total dissolved solids (TDS) and compared with the world health organization specifications (WHO) . It was found that the pH of the Grapolly samples, was not within the range recommended by WHO (6.1-6 .4) less than (6 .5- 8.5).Also the pH of Gasir Alakhiar samples was within the rage (6.1- 6 .3), which was less than the [WHO] specifications. The TDS for the Grapolly and Gasir Alakhiar samples was found (8.16-8.89ppm) (2.56-2.79ppm) respectively, both ranges are less than the [300 –1500 ppm] recommended by WHO. The conductivity of Grpolly and Gasir samples was found (12 .45 –14.5, µ S), (3.76 -4 .88 µ S), which fit the WHO specification. The total hardness values for Grapolly and Gasir samples were (420 - 580 ppm), (380 -408 ppm) respectively. Both of them are within the range of WHO [300 –1500 ppm]. The chloride ion concentration for the water samples of both regions was found (25 -200 ppm) fitting the WHO specifications. Generally, the underground water from both regions was found valid for drinking to WHO standard specifications.

Keywords: TDS, Conductivity, Total Hardness, Chloride Concentration, Ph.