Reservoir · Tamil Nadu · India · CWC · SOUTHERN region
Aliyar
4.2% full
Gross capacity
3.4 TMC (95 MCM)
Live capacity
3.4 TMC (95 MCM)
Primary use
multiple
Operator
CWC
Coordinates
10.481°N, 76.967°E
Last updated
2026-09-24
Capacity in TMC
Aliyar Dam has a gross capacity of 3.4 TMC (95 MCM); it is currently at 4% full, holding 0.14 TMC (4 MCM).
- Gross capacity
- 3.4 TMC (95 MCM)
- Live capacity
- 3.4 TMC (95 MCM)
- Current storage
- 0.14 TMC (4 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
4.2%vs 7 days ago
-6.3%losing
vs 1 year ago
-94.2%year-over-year
7-day trend
↓falling
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. 10.481, 76.967 · Open in Google Maps
About Aliyar
As of September 24, 2026, Aliyar is filled to 4.2% of its total capacity, holding 0.14 TMC (4 MCM) of a gross 3.4 TMC (95 MCM). At this level the reservoir is critically low.
Over the most recent week on record the fill level has fallen by 6.3 percentage points, and it is 94.2 points below its level on the same date a year earlier.
Across the readings we hold for Aliyar — 73 data points between April 3, 2025 and September 24, 2026 — the level has ranged from a low of 0.0% (July 2, 2026) to a high of 100.0% (July 24, 2025). On average the reservoir is fullest around October and at its lowest around March.
It is operated by CWC primarily for multiple purposes.
Key facts
- Current fill level
- 4.2%
- Water stored
- 0.14 TMC (4 MCM)
- Total capacity
- 3.4 TMC (95 MCM)
- 7-day change
- ▼ 6.3 pts
- Year-on-year
- ▼ 94.2 pts
- Primary use
- Multipurpose
- Operator
- CWC
- Coordinates
- 10.481°N, 76.967°E
- Last updated
- September 24, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 24 Sep 2026 | 4.2% | 4 |
| 17 Sep 2026 | 10.5% | 10 |
| 10 Sep 2026 | 10.5% | 10 |
| 3 Sep 2026 | 9.5% | 9 |
| 27 Aug 2026 | 6.3% | 6 |
| 20 Aug 2026 | 5.2% | 5 |
| 13 Aug 2026 | 3.2% | 3 |
| 6 Aug 2026 | 0.0% | 0 |
| 30 Jul 2026 | 0.0% | 0 |
| 23 Jul 2026 | 0.0% | 0 |
| 16 Jul 2026 | 0.0% | 0 |
| 9 Jul 2026 | 0.0% | 0 |