Reservoir · Nagaland · India · CWC · EASTERN region
Doyang
Doyang HEP Dam
59.3% full
Gross capacity
18.9 TMC (535 MCM)
Live capacity
18.9 TMC (535 MCM)
River
Doyang
Basin
Brahmaputra
Primary use
hydropower
Operator
NEEPCO
Coordinates
26.420°N, 94.350°E
Last updated
2026-09-24
Capacity in TMC
Doyang Dam has a gross capacity of 18.9 TMC (535 MCM); it is currently at 59% full, holding 11.2 TMC (317 MCM).
- Gross capacity
- 18.9 TMC (535 MCM)
- Live capacity
- 18.9 TMC (535 MCM)
- Current storage
- 11.2 TMC (317 MCM)
TMC is thousand million cubic feet, the unit used in Indian water reporting. 1 TMC = 28.3168 million cubic metres (MCM). Figures are converted from the Central Water Commission bulletin, which publishes million cubic metres.
Current fill
59.3%vs 7 days ago
-5.8%losing
vs 1 year ago
-10.7%year-over-year
7-day trend
↓falling
Drought context
Storage vs September average
90%of normal
59.3% full on 2026-09-24, against an average of 66.0% for September across 2 years of readings (-6.7 points).
Rain over the last three months · 21 September 2026
Near normal
In the three months to 21 September 2026 the area around Doyang had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −0.04). Rain, not storage. India drought figures →
Weekly storage
Fill history — multi-year
About this reservoir
Data source
official
Storage data: CWC (Central Water Commission) Weekly Storage Bulletin, India. CWC region: EASTERN.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 26.420, 94.350 · Open in Google Maps
About Doyang HEP Dam
As of September 24, 2026, Doyang HEP Dam is filled to 59.3% of its total capacity, holding 11.2 TMC (317 MCM) of a gross 18.9 TMC (535 MCM). At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 5.8 percentage points, and it is 10.7 points below its level on the same date a year earlier.
Across the readings we hold for Doyang HEP Dam — 73 data points between April 3, 2025 and September 24, 2026 — the level has ranged from a low of 31.4% (May 22, 2025) to a high of 69.9% (September 18, 2025). On average the reservoir is fullest around October and at its lowest around May.
It is operated by NEEPCO primarily for hydroelectric power. It lies within the Brahmaputra basin at 26.420°N, 94.350°E.
Key facts
- Current fill level
- 59.3%
- Water stored
- 11.2 TMC (317 MCM)
- Total capacity
- 18.9 TMC (535 MCM)
- 7-day change
- ▼ 5.8 pts
- Year-on-year
- ▼ 10.7 pts
- Primary use
- Hydroelectric power
- River
- Doyang
- River basin
- Brahmaputra
- Operator
- NEEPCO
- Coordinates
- 26.420°N, 94.350°E
- Last updated
- September 24, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 24 Sep 2026 | 59.3% | 317 |
| 17 Sep 2026 | 65.0% | 348 |
| 10 Sep 2026 | 69.0% | 369 |
| 3 Sep 2026 | 65.4% | 350 |
| 27 Aug 2026 | 66.0% | 353 |
| 20 Aug 2026 | 63.0% | 337 |
| 13 Aug 2026 | 66.7% | 357 |
| 6 Aug 2026 | 69.0% | 369 |
| 30 Jul 2026 | 67.5% | 361 |
| 23 Jul 2026 | 63.9% | 342 |
| 16 Jul 2026 | 43.4% | 232 |
| 9 Jul 2026 | 41.5% | 222 |