MICROBIOLOGICAL AND PHYSICO-CHEMICAL ASSESSMENT OF SAFETY OF AGUA LAKE IN ESAN CENTRAL LOCAL GOVERNMENT AREA OF EDO STATE

Adewoyin H. O.*, Deji S. A. and Olaniran Olarinde

ABSTRACT

Microbiology and Physico-chemical analyses of Agua Lake in Esan Central Local Government Area of Edo State were carried out using standard procedures. The multiple table method was used in the analysis for indicator organisms; total coliform bacilli, Escherichia coli and faecal streptococci count. The heterotrophic bacteria count was high 1.7x109cfu/ml – 8.2x1010cfu/ml. The total fungal count at room temperature (28°C for 72 hours was 2x108cfu/ml- 9x109cf/ml. The total coliform count was 25-425 cells/100ml, E.coli, count was 2-17 cells/100ml and faecal streptococci ratio was greater than 4 in all the water samples. The bacteria isolates included; Escherichia coli, Streptococcus faecalis, Klebsiella nerogenes, Proteus mirabilis, Pseudomonas aeruginosa, Staphylococcus aureus and Staphylococcus saprophyticus. The fungi isolates were Penicillum spp, Aspergillus niger and Candida albicans. Though, the result of physico-chemical analysis varied, some were not within the W.H.O recommended limit for drinking water. Based on Microbiological and physico-chemical results, Agua lake water is not fit for consumption prior to treatment especially in the rainy season.

Keywords: Assessment, safety, Season, Coliform, Gastroenteritis, Indicator.