Abstract: Water conditions can be determined by examining the structure of the plankton community. The aim of this study was to evaluate the status of water quality and biota - primarily phytoplankton in the Spermonde Islands. Sampling was carried out at 3 locations in the Spermonde Islands, based on different types of anthropogenic activities, including: Bonebatang Island, Kodingareng Keke, and Barrang Lompo. The physical and chemical conditions of water at the test site in the Spermonde Islands were lightly polluted by organic matter, especially nitrates. The plankton community structure in the test islands shows the characteristics of diversity - low evenness; and high dominance by diatoms.