Basins of CWC
The entire country has been divided into 22 basins as per Central Water Commission.The names of the basins along with their id and area are given in the table.
Basin Map of India
| Sl. No | Basin Code | Basin Name | Area (sq.km) |
| 1 | B1 | Indus (Up to border) | 321289 |
| 2 | B2a | Ganga | 861452 |
| 3 | B2b | Brahmaputra | 194413 |
| 4 | B2c | Barak and others | 41723 |
| 5 | B3 | Godavari | 312812 |
| 6 | B4 | Krishna | 258948 |
| 7 | B5 | Cauvery | 81155 |
| 8 | B6 | Pennar | 55213 |
| 9 | B7 | East flowing rivers between Mahanadi and Pennar | 86643 |
| 10 | B8 | East flowing rivers between Pennar and Kanyakumari | 100139 |
| 11 | B9 | Mahanadi | 141589 |
| 12 | B10 | Brahmani and Baitarni | 51822 |
| 13 | B11 | Subernarekha | 29196 |
| 14 | B12 | Sabarmati | 21674 |
| 15 | B13 | Mahi | 34842 |
| 16 | B14 | West flowing rivers of Kutch and Saurashtra including Luni | 321851 |
| 17 | B15 | Narmada | 98796 |
| 18 | B16 | Tapi | 65145 |
| 19 | B17 | West flowing rivers from Tapi to Tadri | 55940 |
| 20 | B18 | West flowing rivers from Tadri to Kanyakumari | 56177 |
| 21 | B19 | Area of inland drainage in Rajasthan | |
| 22 | B20 | Minor rivers draining into Myanmar & Bangladesh | 36202 |
