He made the revelation to a group of journalists on a field trip in the Walawe zone under SEMA’s ‘toxin free nation’ project.
This situation will be very bad for the Walawe that fulfills drinking and agricultural needs of the people, said the DS.
He said remedial measures are being taken, including the declaration of a 40-metre buffer zone to prevent pollution of the river.
However, there already are human habitats within this proposed zone.
The DS added that action would be taken to prevent settlements, constructions and any excavations in the area.