@incollection{, 456C5F144AA65C90E0EBA482333B0B93 , author={{mohammedabdullahi} and {UNIVERSITY OF ABUJA}}, journal={{Global Journal of Researches in Engineering}}, journal={{GJRE}}2249-45960975-586110.34257/gjre, address={Cambridge, United States}, publisher={Global Journals Organisation}117914 } @incollection{b0, , title={{Environmental Impact on the Quality of Water from Hand dug Wells in Yola Environs}} , author={{ TChiroma } and { BUgheoke } and { DPatrick }} , journal={{Leonardo journal of Sciences}} , year={2007} } @incollection{b1, , title={{Seasonal Variations of Physico-Chemical Characteristics in Water Resources Quality In Western Niger Delta Region}} , author={{ SEfe } and { FOgban } and { MHorsfall } and { Jnr } and { EEAkporhonor }} , journal={{Nigeria. Journal of applied Science and Environmental Management}} 9 1 , year={2005} } @book{b2, , title={{Water Supply and Waste Water Disposal}} , author={{ GFair } and { CGeyer }} , year={1957} , publisher={John Wiley And Sons} , address={NewYork} } @incollection{b3, , title={{Analysis of water quality in Minna metropolis}} , author={{ JOdigure } and { OAdeniyi }} , journal={{Journal of Engineering Technology and Industrial Applications, Crosxing publishers}} , year={2001} } @incollection{b4, , author={{ ASaba } and { ABaba }} , booktitle={{Proceedings of the 8 th National Engineering Conference}} the 8 th National Engineering ConferenceBida, Nigeria; Kaduna Polytechnic, Kaduna , year={2004} } @book{b5, , title={{Water Purification}} , author={{ Wikipedia }} , year={2010} }