The catchment area of the river Cauvery is spread in Karnataka, Tamil Nadu, Kerala and _____.
The Cauvery basin extends more than states of Tamil Nadu, Karnataka, Kerala, and Union Territory of Puducherry exhausting an area of 81,155 Sq.km which is nearly 2.7% of the total environmental area of the country with the greatest length and width of about 560 km and 245 km.