Authors : Dr. Iluyemi Patrick Olorunloba

Volume/Issue : Volume 10 - 2025, Issue 11 - November

Google Scholar : https://tinyurl.com/5f57wx3s

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DOI : https://doi.org/10.38124/ijisrt/25nov1415

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Abstract : The study on Examination of Groundwater Quality within Residential Confines across two Selected States of Niger Delta Areas, Nigeria focused on possibility of septic tank leachate infiltrating groundwater in Niger-delta region of Nigeria, using two cities in selected States of Rivers and Edo States. The study examined physicochemical characteristics of groundwater, and equally investigated possibility of septic tank leachate infiltrating groundwater, using Student t-Test for the hypothesis testing of a significance level (p) of 0.05 and Spearman’s Correlation Analysis. The work used thirty communities as study areas. Grouped into areas with distances between soakaway and water borehole less than 30metres and areas with septic tank to water borehole distances higher than 30metres according to WHO standard (5mg/L). Results showed that all groundwater-quality- parameter tests conformed to maximum permissible limits of WHO, DPR and FEPA. The t-test and Spearman’s results indicated that there was no statistically significant difference between distance of soakaway to borehole and groundwater quality. However, the Biological Oxygen Demand (BOD) was higher than WHO’s criterion. The study recorded highest BOD in Queen’s Park estate (7.21mg/L) and Uniben (7.21mg/L). High BOD in a given sample of water is an indication of polluted water. It requires urgent attention. Government through public/private partnership of building central pipe borne water and central sewage treatment plants can prevent the risk or reduce it to manageable level (mitigation).

Keywords : Pollution, Groundwater, Niger-Delta, Leachate, Contamination

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