Water Quality Study of Ontamiri River in Owerri, Nigeria
Journal Title: Universal Journal of Environmental Research and Technology - Year 2013, Vol 3, Issue 6
Abstract
Water quality levels of Otamiri river was studied to seek explanations for the variations of water quality indicators in the river and also tried to evaluate the influence of urban land use activities and season on the water quality. Water sampling and laboratory analyses were carried out using standard procedures to determine the concentrations of selected parameters in the sample. The data obtained ranged from 10.3 to 161.4 µohms/cm EC, 18.6 to 882.2mg/l TDS, 42.2 to 160.1mg/l total Hardness, 4.2 to 72.6mg/l NO3-, 0.8 to 5.6 PO4, 38.1 to 189.6mg/l SO42-, and 6.6 to 28.2mg/l Cl-. Other results ranged from 2.7 to 5.1 mg/l DO, 2.3 to 18.1mg/l BOD5, <0.02 to 0.09mg/l. Pb, <0.01 to 0.03 Cd, and 8.0 to 86.0Mpn/1000ml total coliform. There was significant difference (P=0.05) between the dry season and rainy season values, with dry season having higher levels. The results further showed that the midstream area that receive wastes from urban land use activities was polluted with parameters such as EC, NO3-, PO4-, Cl-, DO, BOD, Pb, Cd and Total Coliform being higher than the permissible limit.
Authors and Affiliations
Okeke P. N. and Adinna E. N.
Keywords
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