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Authors: Aluyi, Solomon Henry Agbon
Ekhaise, Frederick Osaro
Nevo, Basil
Keywords: Bacteriological and physicochemical quality
E coli
Streptococcus feecalis
Staphylococcus aureus and Boreholes
Issue Date: 2006
Publisher: Estudos de Biologia
Series/Report no.: 28(62);101 – 107
Abstract: The bacteriological and physicochemical quality of five (5) boreholes (Ikoyi’s lodge, Newton’s Villa, Iyobosa hostel, Embassy hostel and Amega Villa) in Ekosodin village were investigated fortnightly, from March 2004 – July 2004.The bacteriological analysis showed low counts of total heterotrophic and potential human pathogenic bacteria that ranged from 1.0 x l0l cfu/ml - 3.1 x 101 cfu/ml, and 0.0 - 1.9 x 101 cfu/ml respectively. Total coliform counts with MPN values ranged from 0.00MPN/100m1 - 9MPN/l00ml. E coli occurred occasionally in stations 2, 3 and 5 with a range of 0.00MPN/l00ml - 4MPN/l00ml. Streptococcus faecalis was observed only in station 3, Clostridium perfringens was not detected in any of the sampled stations. Other organisms isolated and characterized during the study included Staphylococcus aureus and Proteus sp. Some of the physicochemical parameters studied included water temperature, conductivity, pH, total suspended solids and total dissolved solids. All had low mean concentrations that ranged from 27.00C – 28.00C; 9.2 – 13.6us/cm, 6.4 - 6.7; 0.06 - 0.08mg/l and 0.15 - 0.20mg/l respectively. The biological oxygen demand (BOD), dissolved oxygen (DO), total alkalinity and total hardness in mg/l were all low and ranged from 0.08mg/l - 0.2mg/l; 0.7mg/l - 1.0mg/1, 5.0mg/l - 6.0mg/l and 0.10mg/l - 0.l3mg/l respectively. Other parameters with low concentration were nitrate (0.05 - 0.11mg/l), sulphate, (0.07mg/1 - 013mg/l) and phosphate (0.0mg/l - 0.10mg/l). All the physicochemical parameters considered did not indicate any possible physicochemical pollution as they all fell within the (9) maximum permissible level for portable water. There were both positive and negative correlations between some of the bacteriological and physicochemical parameters at a significant level of 95°s probability limit. Based on the bacteriological and physicochemical parameters studied, boreholes 1 and 4 are fit for direct consumption, while boreholes 2, 3 and 5 failed to meet the bacteriological standard for portable water.
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