Reservoir · Kerala · India · CWC · SOUTHERN region
Idamalayar
Idamalayar Dam
69.6% full
Gross capacity
38.8 TMC (1,098 MCM)
Live capacity
36.2 TMC (1,026 MCM)
River
Periyar
Basin
West Flowing
Primary use
hydropower
Operator
KSEB
Coordinates
10.200°N, 76.717°E
Last updated
2026-10-13
Capacity in TMC
Idamalayar Dam has a gross capacity of 38.8 TMC (1,098 MCM), of which 36.2 TMC (1,026 MCM) is live storage; it is currently at 70% full, holding 27.0 TMC (764 MCM).
- Gross capacity
- 38.8 TMC (1,098 MCM)
- Live capacity
- 36.2 TMC (1,026 MCM)
- Current storage
- 27.0 TMC (764 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
69.6%vs 7 days ago
0.0%stable
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
97%of normal
69.6% full on 2026-10-13, against an average of 72.0% for October across 1 year of readings (-2.4 points).
Rain over the last three months · 21 September 2026
Moderately dry
In the three months to 21 September 2026 the area around Idamalayar had well below normal rain, a shortfall seen about one year in six. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −1.27). 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: SOUTHERN.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 10.200, 76.717 · Open in Google Maps
About Idamalayar Dam
As of October 13, 2026, Idamalayar Dam is filled to 69.6% of its total capacity, holding 27.0 TMC (764 MCM) of a gross 38.8 TMC (1,098 MCM). At this level the reservoir is within its normal operating range. Of that total, 36.2 TMC (1,026 MCM) is live storage.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts).
Across the readings we hold for Idamalayar Dam — 1 data points between October 13, 2026 and October 13, 2026 — the level has ranged from a low of 69.6% (October 13, 2026) to a high of 69.6% (October 13, 2026).
It is operated by KSEB primarily for hydroelectric power. It lies within the West Flowing basin at 10.200°N, 76.717°E.
Key facts
- Current fill level
- 69.6%
- Water stored
- 27.0 TMC (764 MCM)
- Total capacity
- 38.8 TMC (1,098 MCM)
- Usable capacity
- 36.2 TMC (1,026 MCM)
- 7-day change
- No change
- Primary use
- Hydroelectric power
- River
- Periyar
- River basin
- West Flowing
- Operator
- KSEB
- Coordinates
- 10.200°N, 76.717°E
- Last updated
- October 13, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 13 Oct 2026 | 69.6% | 764 |