CHENNAI: The Tamil Nadu Desiya Baniyan and Ginning Podhu Thozhilalar Sangam has approached the Madras High Court seeking to implead itself in a writ petition seeking a direction to authorities for cleaning the Noyyal water stored in the Orathuppalayam dam and to prevent future pollution of the river.

It submitted that the union had 6,500 members, who were all labourers in dyeing and hosiery fac