| S.No | Sub Basin List | Area | Rivers | District Covered | Reservoirs under WRD Control | No. of Tanks under WRD |
|---|---|---|---|---|---|---|
| Total PAP basin Area 2406.378 sq.km | ||||||
| 1 | Walayar | 875.124 sq.km | Walayar Kummattipatti Nadhi Varattar Kodavadi Ar Koraiyar Bharathapuzha | Coimbatore | – | 2 |
| 2 | Palar | 520.597 sq.km | Palar, Nallar | Coimbatore | Thirumurthi | 2 |
| 3 | Aliyar | 564.545 sq.km | Aliyar, Uppar, Thunakadavu | Coimbatore | Aliyar | 1 |
| 4 | Sholaiyar | 446.112 sq.km | Varigal Ar, Periyar, Parayankadavu, Sholaiyar, Kallar, Idumala Ar | Coimbatore | Sholaiyar, Parambikulam, Upper Nirar Lower Nirar | 0 |
