Dami, A.Ayuba, H.K.Amukali, O.2023-12-142023-12-142013-02-21Adekunle IM, Adetunji MT, Gbadebo AM and Banjoko OB (2007). Assessment of Groundwater Quality in a Typical Rural Settlement in Southwest Nigeria. Adepelumi A, Ako B and Ajayi IT (2001). Groundwater contamination in basement –complex area of Ile-Ife, southwestern Nigeria: A case study using the electrical-resistivity of geographical method. Hydrogeology Journal. 9(6): Pp. 611 -622. Akan JC (2006). Determination of pollutant levels in some surface and water wastes samples from Kano metropolis, Nigeria. M.Sc. thesis. Department of Chemistry, University of Maiduguri. 88p. Allen JR (1972). Late Quarternary of the Niger Delta and Adjacent Areas. Sedimentary Environments and Lithofacies. 49: Pp. 547-600. Amukali O (2012). Effects of gas flaring and oil spillage on water quality for domestic use in Okpai and Beneku, Delta State, Nigeria. Unpublished M. Sc. Thesis, Department of Geography, University of Maiduguri Avbovbo AA and Ogbe FG (1978). Tertiary Lithostratigraphy of the Niger Delta. A.A. PG. Bull. 62: Pp. 285-300. Badmus BS, Odewande AA, Ojelabi EA and Oyedele T (2001). Leachate contamination effect on groundwater exploration. African Journal of Environmental Studies, 2(1), Pp. 38 – 41. Bhatia (2010). Water Pollution in the Chemical Industries. John Welsh Publications, India. Pp. 35-658.2141-7466https://keffi.nsuk.edu.ng/handle/20.500.14448/4701This study has assessed the probable contamination of ground water resources in Okpai and Beneku area of Delta State, Nigeria. The ground water samples were collected in the dry season (December, January and February) and wet season (June, July and August) seasons from Okpai (experimental site) and Beneku (control site). The water samples were analyzed for Physico -Chemical and biological parameters using standard procedures. The results show that both Okpai and Beneku ground water contained high amounts of magnesium (1.173mg/l in the dry season and 1.277mg/l in the wet season) and iron (0.036mg/l in the dry and 0.021mg/l in the wet) for the former while cadmium (0.002mg/l in the dry and 0.005mg/l in the wet), iron (0.676mg/l in the dry and 1.062mg/l in the wet), magnesium (1.21mg/l in the dry and 1.437mg/l in the wet) and lead (0.004mg/l in the dry and 0.005mg/l in the wet) for the latter. Apart from these specific cases, other values corresponded to the approved maximum permissible level (i.e. maximum permissible limits for drinking water set by NAFDAC, USEPA and WHO). The ground waters therefore, were more impacted upon by chemical parameters, than physical and biological parameters. In conclusion, this study recommends for the Bio- Physico-Chemical assessment extension to other new areas of the Niger Delta region of Nigeria.enGas flaring, Oil spillage, Ground water, PollutionArticle