Assessing the Quality of Treated Wastewater for Irrigation: A Case Study of Ain Sefra Wastewater Treatment Plant

This study aimed to assess the water quality parameters in wastewater treatment plant (WWTP) of Ain Sefra, southwestern Algeria. Various methods were employed analyze performance and suitability WWTP for irrigation. The results revealed effective removal nitrates, with levels below limit set irrigation water. dissolved oxygen content showed efficient biological processes good degradation organic matter. Phosphate found be within FAO Algerian standards. However, elevated ammonia observed, exceeding typical ranges groundwater was evaluated by calculating indices. These indices categorized all samples as either excellent or based on their Sodium Adsorption Ratio (SAR) Kelly’s ratio. sodium percentage values raised concerns about potential negative effects soil. Some deemed unsuitable because high magnesium hazard salinity values. findings offer valuable insights into treated Sefra region. They can inform decision makers stakeholders involved agriculture management.