| S.No | Sub Basin List | Area | Rivers | District Covered | Reservoirs under WRD Control | No. of Tanks under WRD |
|---|---|---|---|---|---|---|
| Total Kodaiyar basin Area 1618.874 sq.km | ||||||
| 1 | Pechiparai | 170.718 sq.km | Kodaiyar | Kanyakumari | Pechiparai | 0 |
| 2 | Chittar | 166.6 sq.km | Chittar | Kanyakumari | Chittar I, Chittar II | 21 |
| 3 | Perunchani | 162.603 sq.km | Paralaiyar | Kanyakumari | Perunchani | 0 |
| 4 | Kuzhithuraiyar | 344.966 sq.km | Tamiraparani | Kanyakumari | – | 762 |
| 5 | Valliyar | 213 sq.km | Valliyar | Kanyakumari | Mambalathuraiyar | 681 |
| 6 | Pazhayar | 559.665 sq.km | Pazhayar, Poigaiyar | Kanyakumari | Poigaiyar | 576 |
