ABSTRACT This research was conducted in September 2019 to determined the chlorophyll-a concentration, TSS concentration and relationship and distribution patterns of chlorophyll-a and TSS around Bukit Batu river estuary, Bukit Batu District, Bengkalis Regency. Clorophyl-a and TSS from 4 Stations with 3 replication were taken from the estuary. The results showed that the chlorophyll-a conc…