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Environ Monit Assess. 2010 Sep;168(1-4):1-10. doi: 10.1007/s10661-009-1086-3. Epub 2009 Jul 22.

Effect of highways and local activities on the quality of underground water in Ogun State, Nigeria: a case study of three districts in Ogun State, Nigeria.

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  • 1Department of Chemistry, University of Agriculture, Abeokuta, Abeokuta, Nigeria. ooodukoya@yahoo.com

Abstract

The effect of highways and local activities on the quality of groundwater in Ogun State, Nigeria was investigated. This was done by collecting groundwater samples from three different districts in the state, located in Southwestern Nigeria. The water samples collected at 5 m from the highway and control samples collected at 3 km from the highway were analyzed for the following physicochemical parameters: pH, conductivity, chemical oxygen demand, alkalinity, total hardness, total solid, suspended solid, dissolved solid, chloride, sulfate, phosphate, nitrate, phenol, and the metals-lead, zinc, iron, aluminum, sodium, and potassium. The levels of chromium, copper, and cadmium in the samples were below the detectable limit. The levels of the parameters show that there are significant differences between those in the samples and the controls (F test) except for phosphate and phenol. Also, anthropogenic sources (local activities) elevate the levels of different specific parameters, which are related to these activities. Good correlation was observed between traffic density and lead levels as well as between conductivity and dissolved solids. Comparisons with the World Health Organization guidelines indicate that most of the water samples are not suitable for human consumption.

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