Reservoir · Kerala · India · KSEB
Idukki
Idukki Dam
61.9% of gross capacity
Gross capacity
70.5 TMC (1,996 MCM)
Live capacity
51.8 TMC (1,467 MCM)
River
Periyar
Basin
West Flowing
Primary use
hydropower
Operator
KSEB
Coordinates
9.850°N, 76.967°E
Last updated
2026-10-27
Capacity in TMC
Idukki Dam has a gross capacity of 70.5 TMC (1,996 MCM), of which 51.8 TMC (1,467 MCM) is live storage; it is currently at 61.9% of gross capacity, holding 43.6 TMC (1,235 MCM) (84.2% of live capacity).
- Gross capacity
- 70.5 TMC (1,996 MCM)
- Live capacity
- 51.8 TMC (1,467 MCM)
- Current storage
- 43.6 TMC (1,235 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 KSEB, which publishes million cubic metres. The percentage is labelled live or gross only when the stored volume matches that capacity.
Current fill
61.9%vs 22 Oct 2026
+2.4 ppgaining
vs 1 year ago
N/ATrend
↑rising
Drought context
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Idukki 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 −0.73). Rain, not storage. India drought figures →
Weekly storage
Fill history — multi-year
About this reservoir
Data source
official
Storage data: KSEB.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 9.850°N, 76.967°E · Open in Google Maps
About Idukki Dam
As of October 27, 2026, Idukki Dam is filled to 61.9% of its gross capacity, holding 43.6 TMC (1,235 MCM) of a gross 70.5 TMC (1,996 MCM). At this level the reservoir is within its normal operating range. Of that total, 51.8 TMC (1,467 MCM) is live storage.
Since October 22, 2026 the fill level has risen by 2.4 percentage points.
Across the readings we hold for Idukki Dam — 25 data points between June 25, 2026 and October 27, 2026 — the level has ranged from a low of 23.5% (June 25, 2026) to a high of 63.5% (September 3, 2026).
It is operated by KSEB primarily for hydroelectric power. It lies within the West Flowing basin at 9.850°N, 76.967°E.
Key facts
- Current fill level
- 61.9% of total capacity
- Water stored
- 43.6 TMC (1,235 MCM)
- Total capacity
- 70.5 TMC (1,996 MCM)
- Usable capacity
- 51.8 TMC (1,467 MCM)
- Change since October 22, 2026
- ▲ 2.4 pp
- Primary use
- Hydroelectric power
- River
- Periyar
- River basin
- West Flowing
- Operator
- KSEB
- Coordinates
- 9.850°N, 76.967°E
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 61.9% | 1,235 |
| 23 Oct 2026 | 60.1% | 1,200 |
| 22 Oct 2026 | 59.5% | 868 |
| 15 Oct 2026 | 58.8% | 859 |
| 8 Oct 2026 | 60.0% | 876 |
| 1 Oct 2026 | 60.8% | 887 |
| 24 Sep 2026 | 60.9% | 889 |
| 17 Sep 2026 | 61.1% | 1,221 |
| 10 Sep 2026 | 62.8% | 917 |
| 3 Sep 2026 | 63.5% | 927 |
| 28 Aug 2026 | 61.7% | 1,231 |
| 27 Aug 2026 | 60.8% | 888 |