| S.No | Sub Basin List | Area | Rivers | District Covered | Reservoirs under WRD Control | No. of Tanks under WRD |
|---|---|---|---|---|---|---|
| Total Agniyar basin Area 4702.135 sq.km | ||||||
| 1 | Agniyar | 2106.431 sq.km | Kattar, Agniyar, Nasuvunni, Maharajasamudram | Pudukottai, Thanjavur | – | 487 |
| 2 | Ambuliyar | 825.694 sq.km | Punaikuttiyar, Ambuliyar, Velunniyar, Tedakkiyar | Pudukottai, Thanjavur | – | 253 |
| 3 | 1770.01 sq.km | Kundar, Vellar, Karaiyar | Pudukottai, Trichy, Thanjavur | – | 456 | |
