Water Quality Index: Important Instrument for Environmental Monitoring of Anambra State Central Senatorial Zone Water Resources. J Pol Monit Eval Stud Contr [Internet]. 2026 May 30 [cited 2026 Jun. 3];5(1):216-34. Available from: https://journals.ipsintelligentsia.com/environmental-science/index.php/ipmesc/article/view/33