Bacteriological Characteristics of Spring Water in Ambo Town, West Shoa Zone, Oromia Region, Ethiopia

Abstract Present study was carried out to assess the quality of spring waters in terms of microbiological and chemical characters from Ambo. The results of the study revealed that chemical parameters such as pH (6.36-7.94),TDS(407-1041mg/L), DO(1.5-5.85mg/L),TS (1170-495mg/L), total alkalinity (313-1277mg/L), total hardness (38-1274 mg/L),COD (70.5-9mg/L)in the “Hora” water were higher than the maximum permissible levels of WHO standards for drinking waters. Total aerobic mesophilic bacterial counts tested were found to be as0.977×104 cfu/ml for SFWS, 2.35 ×104cuf/ml for CDSTRM,1.14×104cfu/ml for HB,0.553×104 cfu/ml for HD and2.72×104for Huluka streams samples. The “Hora” water contained different coli forms when tested by most probable number (MPN) method found to be in the order of 0.66 × 102 cfu/ml for SFWS, 39 x 102 cfu/ml for CDSTRM, 0×102 for HB, 0×102forHDand28×102cfu/ml for Huluka stream. The water samples from the different “Hora” water sources showed significant variations with respect to bacteriological and chemical characteristics during study period. Statistical analysis showed significant difference (p <0.05) in the distribution of total coli form, and aerobic mesophilic heterotrophic bacteria at various sampling locations. The study concluded poor water quality in terms of bacteriological and chemical characteristics of “Hora”water sources as all the parameters were well above WHO prescribed standards.

Keywords Ambo town, bacteriological & chemical characteristics, Hora spring water, Huluka river, water quality, WHO standards.

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