Reservoir · Assam · India · CWC · EASTERN region
Kopili (Umrong)
Kopili HES — Umrong Dam
81.1% full
Gross capacity
37.2 TMC (1,052 MCM)
Live capacity
37.2 TMC (1,052 MCM)
River
Kopili
Basin
Brahmaputra
Primary use
hydropower
Operator
NEEPCO
Coordinates
25.990°N, 93.220°E
Last updated
2026-09-24
Capacity in TMC
Kopili (Umrong) Dam has a gross capacity of 37.2 TMC (1,052 MCM); it is currently at 81% full, holding 4.6 TMC (129 MCM).
- Gross capacity
- 37.2 TMC (1,052 MCM)
- Live capacity
- 37.2 TMC (1,052 MCM)
- Current storage
- 4.6 TMC (129 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
81.1%vs 7 days ago
-1.7%losing
vs 1 year ago
+24.4%year-over-year
7-day trend
↓falling
Drought context
Storage vs September average
116%of normal
81.1% full on 2026-09-24, against an average of 70.0% for September across 2 years of readings (+11.1 points).
Rain over the last three months · 21 September 2026
Near normal
In the three months to 21 September 2026 the area around Kopili (Umrong) 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 −0.42). 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. 25.990, 93.220 · Open in Google Maps
About Kopili HES — Umrong Dam
As of September 24, 2026, Kopili HES — Umrong Dam is filled to 81.1% of its total capacity, holding 4.6 TMC (129 MCM) of a gross 37.2 TMC (1,052 MCM). At this level the reservoir is high.
Over the most recent week on record the fill level has fallen by 1.7 percentage points, and it is 24.4 points above its level on the same date a year earlier.
Across the readings we hold for Kopili HES — Umrong Dam — 73 data points between April 3, 2025 and September 24, 2026 — the level has ranged from a low of 25.3% (April 23, 2026) to a high of 100.0% (September 3, 2026). On average the reservoir is fullest around September and at its lowest around March.
It is operated by NEEPCO primarily for hydroelectric power. It lies within the Brahmaputra basin at 25.990°N, 93.220°E.
Key facts
- Current fill level
- 81.1%
- Water stored
- 4.6 TMC (129 MCM)
- Total capacity
- 37.2 TMC (1,052 MCM)
- 7-day change
- ▼ 1.7 pts
- Year-on-year
- ▲ 24.4 pts
- Primary use
- Hydroelectric power
- River
- Kopili
- River basin
- Brahmaputra
- Operator
- NEEPCO
- Coordinates
- 25.990°N, 93.220°E
- Last updated
- September 24, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 24 Sep 2026 | 81.0% | 129 |
| 17 Sep 2026 | 82.8% | 132 |
| 10 Sep 2026 | 81.9% | 130 |
| 3 Sep 2026 | 100.0% | 159 |
| 27 Aug 2026 | 82.3% | 131 |
| 20 Aug 2026 | 82.3% | 131 |
| 13 Aug 2026 | 80.2% | 128 |
| 6 Aug 2026 | 81.9% | 130 |
| 30 Jul 2026 | 81.1% | 129 |
| 23 Jul 2026 | 81.1% | 129 |
| 16 Jul 2026 | 80.5% | 128 |
| 9 Jul 2026 | 76.1% | 121 |