| River Basin-wise Number of Hydrological Observations Sites in India (As on 30.09.2020) | |||||||||
| Basin | G | GD | GDQ | GDS | GDSQ | GQ | SG & met | WQSS | Grand Total |
| Brahmani-Baitarani | |||||||||
| Cauvery | |||||||||
| East Flowing Rivers Between Mahanadi and Peneer | |||||||||
| East Flowing Rivers Between Pennar and Kanyakumari | |||||||||
| Ganga /Brahmaputra /Meghna /Barak | |||||||||
| Godavari Basin | |||||||||
| Indus Basin | |||||||||
| Krishna | |||||||||
| Mahanadi | |||||||||
| Mahi | |||||||||
| Minor Rivers Draining Into Myanmar and Bangladesh | |||||||||
| Narmada | |||||||||
| Pennar | |||||||||
| Sabarmati | |||||||||
| Subarnarekha | |||||||||
| Tapi | |||||||||
| West Flowing Rivers from Tadri to Kanyakumari | |||||||||
| West Flowing Rivers from Tapi to Tadri | |||||||||
| West Flowing Rivers of Kutchh and Saurashtra Including Luni | |||||||||
| Areas of Inland Drainage in Rajasthan | |||||||||
| Grand Total | |||||||||
