Water quality indices (WQIs): An in-depth analysis and overview Mohamed Moudou, Yahya El Hammoudani, Khadija Haboubi, Iliass Achoukhi, Mustapha El Boudammoussi, Hatim Faiz, Abdelaziz Touzani and Fouad Dimane E3S Web Conf., 527 (2024) 02015 Published online: 24 May 2024 DOI: 10.1051/e3sconf/202452702015