Journal of Environmental Science and Water Resources ISSN 2277 0704
Vol. 4(4), pp. 112 - 116, June 2015 2015 Wudpecker Journals
Microbiological risk assessment of groundwater sources in Ikorodu- a peri-urban Lagos settlement
Oluremi N. Olaleye*1,2 and Abdul Hakeem B. Ogunbajo3
1WEDC, Loughborough University, United Kingdom.
*Corresponding author E-mail: O.N.Olaleye@lboro.ac.uk. Tel: +234 809 840 6663.
Accepted 03 June 2015
More than three quarters of the residents of Lagos peri-urban communities rely solely on the private underground water sources without concerns on public health implications. The aim of the study was to determine the microbiological quality of a large spectrum of underground water available for the residents of the rapidly developing peri-urban community of Ikorodu, Lagos, Nigeria. Water samples were collected from a total of one hundred and fifty underground water sources including wells and boreholes in a randomly stratified manner covering five sub-communities of Ibeshe, Odonguyan, Igbogbo, Haruna (Lowa area) and Lambo Lasuwon. A total of thirty samples were collected from each of the sub-locations in similarly stratified manner. The samples were analyzed microbiologically for the presence of Faecal Indicator Bacteria (FIB) using vacuum membrane filtration techniques and pre-prepared selective medium for coliform detection. The results showed high FIB concentration above WHO standard in more than 85% of underground water assessed indicating a high risk of pathogen presence which may lead to water borne infections.
Key words: Coliform, Faecal Indicator Bacteria (FIB), pathogens, peri-urban, underground water.