1. Adebola KD (2001) Groundwater quality in Ilorin Township: an environmental review. Afr J Environ Studies 2:4–6
2. Adelekan BA, Ogunde OA (2012) Quality of water from dug wells and the lagoon in Lagos Nigeria and associated health risks. Sci Res Essays 7:1195–1211
3. American Public Health Association (APHA), American Water Works Association (AWWA) and Water Environment Federation (WEF) (2005) Standard methods for the examination of water and wastewater, 21st edn. APHA, AWWA and WEF, Washington DC, pp 1–564
4. Chilvers DC, Peterson PJ (1987) Global cycling of arsenic. In: Hutchinson TC, Meema KM (eds) Lead, mercury, cadmium and arsenic in the environment. John Wiley & Sons, Chichester , pp 279–3031987
5. Ebegbulem JC, Ekpe D, Adejumo AO (2013) Oil exploration and poverty in the Niger Delta region of Nigeria: a critical analysis. Int J Bus Soc Sci 4:279–287