Water quality indices for groundwater impacted by geogenic background and anthropogenic pollution: case study in Hidalgo, Mexico - D. A. Rivera-Rodríguez; R. I. Beltrán-Hernández; C. A. Lucho-Constantino; C. Coronel-Olivares; S. Hernández-González; M. Villanueva-Ibáñez; V. Nolasco-Arizmendi; G. A. Vázquez-Rodríguez (International Journal of Environmental Science and Technology, 2019)