Reservoir · Tamil Nadu · India · CWC
Poondi
40.3% full
Gross capacity
3.2 TMC (91 MCM)
Live capacity
3.2 TMC (91 MCM)
River
Kosasthalaiyar
Basin
Chennai
Primary use
drinking
Operator
Tamil Nadu Water Resources Dept
Coordinates
13.210°N, 79.871°E
Last updated
2026-09-11
Capacity in TMC
Poondi Dam has a gross capacity of 3.2 TMC (91 MCM); it is currently at 40% full, holding 1.3 TMC (37 MCM).
- Gross capacity
- 3.2 TMC (91 MCM)
- Live capacity
- 3.2 TMC (91 MCM)
- Current storage
- 1.3 TMC (37 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
40.3%vs 7 days ago
-0.8%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. 13.210, 79.871 · Open in Google Maps
About Poondi
As of September 11, 2026, Poondi is filled to 40.3% of its total capacity, holding 1.3 TMC (37 MCM) of a gross 3.2 TMC (91 MCM). At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (-0.8 pts).
Across the readings we hold for Poondi — 6 data points between July 2, 2026 and September 11, 2026 — the level has ranged from a low of 33.0% (July 2, 2026) to a high of 41.2% (September 4, 2026).
It is operated by Tamil Nadu Water Resources Dept primarily for drinking-water supply. It lies within the Chennai basin at 13.210°N, 79.871°E.
Key facts
- Current fill level
- 40.3%
- Water stored
- 1.3 TMC (37 MCM)
- Total capacity
- 3.2 TMC (91 MCM)
- 7-day change
- ▼ 0.8 pts
- Primary use
- Drinking-water supply
- River
- Kosasthalaiyar
- River basin
- Chennai
- Operator
- Tamil Nadu Water Resources Dept
- Coordinates
- 13.210°N, 79.871°E
- Last updated
- September 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Sep 2026 | 40.3% | 37 |
| 4 Sep 2026 | 41.2% | 38 |
| 30 Aug 2026 | 40.1% | 37 |
| 22 Aug 2026 | 38.5% | 35 |
| 14 Aug 2026 | 36.2% | 33 |
| 2 Jul 2026 | 33.0% | 30 |