Groundwater quality assessment using water quality index: A case study of Al Najaf City, Iraq. Periodicals of Engineering and Natural Sciences, [S. l.], v. 8, n. 3, p. 1482–1490, 2020. DOI: 10.21533/pen.v8.i3.1188. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/1188. Acesso em: 3 jun. 2026.