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Water quality assessment of Ogun river, South West Nigeria

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Abstract

The quality of Ogun river in South-West, Nigeria was studied by a field survey for a period of 1 year (covering dry season and rainy season). Water samples were collected from thirteen sites and analysed for physico-chemical and bacteriological parameters as well as heavy metals using standard methods. Generally, the values obtained for turbidity, phosphate, oil and grease, iron and faecal coliform from all the sites in both seasons were above the maximum acceptable limit set by the World Health Organization (WHO) for drinking water. Also, the manganese content from all the sites in the dry season, lead concentrations from three sites in the dry season and cadmium concentrations from some sites in both seasons were above the WHO limit. The values obtained for total dissolved solids, dissolved oxygen and chloride at site M in the dry season and nitrate at site J in the rainy season were also above the WHO limit. Pollution of Ogun river water along its course is evidenced by the high concentrations of pollution indicators, nutrients and trace metals above the acceptable limit. This poses a health risk to several rural communities who rely on the river primarily as their source of domestic water. The study showed a need for continuous pollution monitoring programme of surface waters in Nigeria.

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Authors and Affiliations

  1. Department of Environmental Management and Toxicology, University of Agriculture, Abeokuta, Ogun State, Nigeria

    M. O. Jaji, O. Bamgbose & T. A. Arowolo

  2. Department of Chemical Sciences, University of Agriculture, Abeokuta, Ogun State, Nigeria

    O. O. Odukoya

Authors
  1. M. O. Jaji
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  2. O. Bamgbose
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  3. O. O. Odukoya
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  4. T. A. Arowolo
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Correspondence to T. A. Arowolo.

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Jaji, M.O., Bamgbose, O., Odukoya, O.O. et al. Water quality assessment of Ogun river, South West Nigeria. Environ Monit Assess 133, 473–482 (2007). https://doi.org/10.1007/s10661-006-9602-1

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  • DOI: https://doi.org/10.1007/s10661-006-9602-1

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