ABSTRACT Research on the relationship between chlorophyll-a concentration and total phosphorus was conducted in Januari-Februari 2021 in Tanjung Kudu Lake and Parit Lake, Tambang District. The aims of this study was to determine the relationship between chlorophyll-a and total phosphorus concentration. There were 3 Station, namely Station 1 (inlet), Station 2 (in the middle of lake), and …