The study aimed to evaluate water quality at Bung Binh Thien Reservoir, in An Giang Province, Viet Nam using Shannon-Wiener species diversity index (H’) and associated average score per taxon (ASPT) calculated from composition of phytoplankton and zoobenthos. | Evaluating the possible use of phytoplankton and zoobenthos for water quality assessment A case study at Bung Binh Thien reservoir An Giang province Viet Nam