Reservoir · Assam · India · CWC · EASTERN region
Kopili (Umrong)
Kopili HES — Umrong Dam
59.1% 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
2026-10-22
Capacity in TMC
Kopili (Umrong) Dam has a gross capacity of 37.2 TMC (1,052 MCM); it is currently at 59.1% full, holding 3.3 TMC (94 MCM).
- Gross capacity
- 37.2 TMC (1,052 MCM)
- Live capacity
- 37.2 TMC (1,052 MCM)
- Current storage
- 3.3 TMC (94 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 CWC, which publishes million cubic metres. The percentage is labelled live or gross only when the stored volume matches that capacity.
Current fill
59.1%vs 7 days ago
-22.2 pplosing
vs 1 year ago
-12.6 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
87%of normal
59.1% full on 2026-10-22, against an average of 68.0% for October across 2 years of readings (-8.9 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 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 −0.90). Rain, not storage. India drought figures →
Weekly storage
Fill history — multi-year
About this reservoir
Data source
official
Storage data: CWC. 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°N, 93.220°E · Open in Google Maps
About Kopili HES — Umrong Dam
As of October 22, 2026, Kopili HES — Umrong Dam has a published fill of 59.1%, holding 3.3 TMC (94 MCM). Gross capacity is 37.2 TMC (1,052 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 22.2 percentage points, and it is 12.6 points below its level on the same date a year earlier.
Across the readings we hold for Kopili HES — Umrong Dam — 77 data points between April 3, 2025 and October 22, 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
- 59.1%
- Water stored
- 3.3 TMC (94 MCM)
- Total capacity
- 37.2 TMC (1,052 MCM)
- 7-day change
- ▼ 22.2 pp
- Year-on-year
- ▼ 12.6 pp
- Primary use
- Hydroelectric power
- River
- Kopili
- River basin
- Brahmaputra
- Operator
- NEEPCO
- Coordinates
- 25.990°N, 93.220°E
- Last updated
- October 22, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 22 Oct 2026 | 59.1% | 94 |
| 15 Oct 2026 | 81.4% | 129 |
| 8 Oct 2026 | 84.3% | 134 |
| 1 Oct 2026 | 72.9% | 116 |
| 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 |