In the past year, the Greater Chennai Corporation has fished out nearly 22,000 tonnes of trash from the Cooum.
Beginning December 2017, the Corporation began placing trash boom barriers in the polluted river. Initially, they were placed in four places, followed by another four.
The eight trash boom barriers have acted as nets, preventing the trash from entering the sea, civic officials said. Sources in the Corporation said while nearly 50-60% of the floating garbage consists of sludge, plastic materials contribute 10%. The remaining trash comprise of water hyacinth, tree branches, thermocol boxes and discarded household articles.