| S.No | Sub Basin List | Area | Rivers | District Covered | Reservoirs under WRD Control | No. of Tanks under WRD |
|---|---|---|---|---|---|---|
| Total Kallar basin Area 1506.668 sq.km | ||||||
| 1 | Kallar | 669.769 sq.km | Malattar Odai, Kallar | Tuticorin | – | 19 |
| 2 | Chalikulamar | 230.114 sq.km | Chalikulamar | Tuticorin | – | 7 |
| 3 | Korampallam | 606.785 sq.km | Korampallam Odai Madikettan Odai | Tuticorin | – | 8 |
