TI - Assessing the water quality of a rural South-Eastern Nigeria river using water quality assessment indices AU - ANYANWU, E.D. AU - SIMU, S.A. AU - ADETUNJI, O.G. AU - STEPHEN, A.G. SO - Sigma Journal of Engineering and Natural Sciences 2026;44:3055-3066. DO - 10.14744/sigma.2026.2143