Water Quality Assessment of Al-Najaf City Potable Water Network

Water is an essential aspect of life and important in evolution. Recently the potable water quality topic has received much attention. The study aims to determine drinking Al-Najaf City by collecting samples throughout city comparing results with Iraqi guidelines (IQS 417) World Health Organization (WHO) guidelines, as well calculate WQI. Samples were tested laboratory between December 2021 June 2022. showed that multiple parameters exceeded allowable limits during both testing periods; winter months, TDS turbidity upper locations. Total hardness values also limit 500 ppm for all taken period. For magnesium calcium, summer measurements mainly within limits, unlike period which mostly limits. Residual chlorine tests had higher concentrations, generally ranging from 0.25 0.8 mg/l. While During summer, concentrations dropped below sampling points. concluded majority gathered months poor total WQI (99-110), collected rated good ranged (75-81).