eng Science and Education Publishing American Journal of Water Resources 2333-4819 2021-12-01 9 2 103 110 10.12691/ajwr-9-2-7 AJWR2021927 article Ezzat Ahmed Abd Elsayed ezzatahmed@gmail.com 1 Elhag A. B 2 Yousif A. M 3 Head department of Engineering Geology and Hydrology, Faculty of Earth sciences and Mining, Dongola University, Sudan Department of Civil Engineering, College of Engineering, King Khalid University, Saudi Arabia Department of Geology, Faculty of sciences, University of Kordofan, Sudan In this current study, groundwater quality is the main hydrological problem. The study aims to define the groundwater quality in the Assessment and Evaluation of Ground water Quality in North East Wadi Halfa, Northern State, Sudan. Physical, chemical and biological analyses were carried out on 10 water samples collected from the existing wells. For investigating different cations and anions the titration, spectrophotometer and flame photometer were used. Chemical analysis shows high concentration of sulfates and nitrates. The hydrochemical classification of groundwater explained for groups: (Na+ + K+), HCO3¨C water, (Na+ + K+), (SO++ + Cl-) water, (Ca++ + Mg++), HCO3 ¨C water and (Ca++ + Mg++), (SO++ + Cl-) water. Bacteriological analysis was made for 10 samples; water is free of contamination. A comparison has been made between two-water analysis in 1991 and 2019, as a result decreasing in the salts concentration in the latter. Therefore, according to the results of this study, it is recommended and guided for further pumping and continuous using of the water well in agriculture purposes. http://pubs.sciepub.com/ajwr/9/2/7/ajwr-9-2-7.pdf cations anions analysis hydrochemical contamination