Reservoir · Tamil Nadu · India · CWC
Perumpallam
34.6% full
Gross capacity
0.11 TMC (3 MCM)
Live capacity
0.11 TMC (3 MCM)
River
Cauvery Basin
Basin
Cauvery
Primary use
irrigation
Operator
Tamil Nadu Water Resources Dept
Coordinates
11.559°N, 77.313°E
Last updated
2026-09-11
Capacity in TMC
Perumpallam Dam has a gross capacity of 0.11 TMC (3 MCM); it is currently at 35% full, holding 0.04 TMC (1 MCM).
- Gross capacity
- 0.11 TMC (3 MCM)
- Live capacity
- 0.11 TMC (3 MCM)
- Current storage
- 0.04 TMC (1 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
34.6%vs 7 days ago
-1.0%losing
vs 1 year ago
N/A7-day trend
→stable
Weekly storage
Fill history — multi-year
About this reservoir
Data source
official
Storage data: CWC (Central Water Commission) Weekly Storage Bulletin, India.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 11.559, 77.313 · Open in Google Maps
About Perumpallam
As of September 11, 2026, Perumpallam is filled to 34.6% of its total capacity, holding 0.04 TMC (1 MCM) of a gross 0.11 TMC (3 MCM). At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-1.0 pts).
Across the readings we hold for Perumpallam — 6 data points between July 2, 2026 and September 11, 2026 — the level has ranged from a low of 34.6% (September 11, 2026) to a high of 50.0% (July 2, 2026).
It is operated by Tamil Nadu Water Resources Dept primarily for irrigation. It lies within the Cauvery basin at 11.559°N, 77.313°E.
Key facts
- Current fill level
- 34.6%
- Water stored
- 0.04 TMC (1 MCM)
- Total capacity
- 0.11 TMC (3 MCM)
- 7-day change
- ▼ 1.0 pts
- Primary use
- Irrigation
- River
- Cauvery Basin
- River basin
- Cauvery
- Operator
- Tamil Nadu Water Resources Dept
- Coordinates
- 11.559°N, 77.313°E
- Last updated
- September 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Sep 2026 | 34.6% | 1 |
| 4 Sep 2026 | 35.6% | 1 |
| 30 Aug 2026 | 36.5% | 1 |
| 21 Aug 2026 | 38.6% | 1 |
| 14 Aug 2026 | 40.2% | 1 |
| 2 Jul 2026 | 50.0% | 2 |