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M. N. Chukwu
D. N. Ohakwe


The effects of season on the physico-chemical parameters were investigated at Imo River to
determine its suitability for drinking and usage for domestic purposes. Sampling was conducted in
rainy and dry seasons; January to August, 2017. Water samples were collected from four stations
(Obowo, Mbaise, Umuokpara and Okpala) along the river and analyzed using standard methods.A
total of seventeen physico-chemical characteristics were analyzed. These include pH, transparency,
water temperature, conductivity, turbidity and total alkalinity, Dissolved Oxygen (DO) and
Biological Oxygen Demand (BOD). Others are Chloride, Sulphate, Phosphate, Nitrate, Calcium,
Magnesium, Potassium and Sodium. Results showed that eight of the parameters (transparency,
conductivity, turbidity, TDS, mean concentrations of Chlorine, Phosphate, Calcium and Sodium)
exhibited significant seasonal variations. All the parameters had higher values during the rainy
season except temperature, transparency and concentration of metals. All the parameters were
within the World Health Organization’s (WHO) and Federal Environmental Protection
Agency’s(FEPA) prescribed limit for drinking water, thus the water can be said to be of good

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How to Cite
Chukwu, M. N., & Ohakwe, D. N. (2020). SEASONAL VARIATIONS IN THE PHYSICO-CHEMICAL PARAMETERS OF IMO RIVER, IMO STATE NIGERIA . The Bioscientist Journal, 8(1), 25-39. Retrieved from


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