TY - JOUR T1 - Gray water footprint-based water quality sustainability indices: an innovative approach for river basins JO - RBRH A1 - Masteghin, Lígia Tambasco A1 - Gonçalves, Flávio Aparecido A1 - Silveira, Alexandre A1 - Cunha, Fernando França da A1 - Oliveira, Job Teixeira de SN - 2318-0331 UL - 10.1590/2318-0331.312620250144 VL - 31 Y1 - 2026 PB - Brasil ER -