Bacteriological Examination of Ground Water in Omdurman, Elthawra Locality

Abstract

This study was carried out to assess the bacteriological quality of ground water in Omdurman, Elthawra Locality. Fifty-four samples from 18 wells (one sample for each of the three seasons), were collected and examined bacteriologically to detect total coliforms, faecal coliforms and E. coli. The method used was Multiple Tube Method. The study was conducted during the period from August 2002 to April 2003 so as to cover the three seasons (Winter, Summer and Autumn) in Sudan,as spring is not noticed in Sudan. The study showed that, the ground water quality was excellent in 27.7% of the study area, namely Hara 9(B), 11(B), 14, 23 and 25 which was evidenced by MPN zero throughout the duration of the study. Other site showed the presence of total coliforms,. Madinat Elneel (B) (MPN = 11) in Autumn, Hara 4 (MPN = 18) in Autumn and 10(B) (MPN = 13) in Winter. Madinat Elneel (A) showed coliforms bacteria during two seasons (MPN = 20) during Autumn and (MPN =17) in Summer. The other sites showed good quality of water (MPN <10). The study confirmed faecal contamination in Riyadh (Hara 8) during the three seasons of the study. The study found that, there was a seasonal variation of ground water quality. The high number of bacteria were detected during the rainy season.