Reservoir · Tamil Nadu · India · CWC · SOUTHERN region
Vaigai
Vaigai Dam
24.4% of live capacity
Gross capacity
8.1 TMC (230 MCM)
Live capacity
6.4 TMC (181 MCM)
River
Vaigai
Basin
East Flowing
Primary use
irrigation
Operator
TNPWD
Coordinates
10.033°N, 77.583°E
Last updated
2026-10-22
Capacity in TMC
Vaigai Dam has a gross capacity of 8.1 TMC (230 MCM), of which 6.4 TMC (181 MCM) is live storage; it is currently at 24.4% of live capacity, holding 1.5 TMC (42 MCM).
- Gross capacity
- 8.1 TMC (230 MCM)
- Live capacity
- 6.4 TMC (181 MCM)
- Current storage
- 1.5 TMC (42 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 CWC, which publishes million cubic metres. The percentage is labelled live or gross only when the stored volume matches that capacity.
Current fill
24.4%vs 7 days ago
+4.7 ppgaining
vs 1 year ago
-68.6 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
48%of normal
24.4% full on 2026-10-22, against an average of 51.0% for October across 4 years of readings (-26.6 points).
Rain over the last three months · 11 October 2026
Severely dry
In the three months to 11 October 2026 the area around Vaigai had far less rain than normal, a shortfall seen about one year in fifteen. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −1.70). Rain, not storage. India drought figures →
Weekly storage
Fill history — multi-year
About this reservoir
Data source
official
Storage data: CWC. 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. 10.033°N, 77.583°E · Open in Google Maps
About Vaigai Dam
As of October 22, 2026, Vaigai Dam is at 24.4% of useful capacity, holding 1.5 TMC (42 MCM) of 6.4 TMC (181 MCM). Of the gross 8.1 TMC (230 MCM), that is 18.3%. At this level the reservoir is low.
Over the most recent week on record the fill level has risen by 4.7 percentage points, and it is 68.6 points below its level on the same date a year earlier.
Across the readings we hold for Vaigai Dam — 171 data points between June 8, 2023 and October 22, 2026 — the level has ranged from a low of 1.7% (May 29, 2026) to a high of 100.0% (January 11, 2024). On average the reservoir is fullest around November and at its lowest around May.
It is operated by TNPWD primarily for irrigation. It lies within the East Flowing basin at 10.033°N, 77.583°E.
Key facts
- Current fill level
- 24.4% of useful capacity
- Water stored
- 1.5 TMC (42 MCM)
- Total capacity
- 8.1 TMC (230 MCM)
- Usable capacity
- 6.4 TMC (181 MCM)
- 7-day change
- ▲ 4.7 pp
- Year-on-year
- ▼ 68.6 pp
- Primary use
- Irrigation
- River
- Vaigai
- River basin
- East Flowing
- Operator
- TNPWD
- Coordinates
- 10.033°N, 77.583°E
- Last updated
- October 22, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 22 Oct 2026 | 24.4% | 42 |
| 15 Oct 2026 | 19.8% | 34 |
| 8 Oct 2026 | 19.8% | 34 |
| 1 Oct 2026 | 18.0% | 31 |
| 24 Sep 2026 | 19.2% | 33 |
| 17 Sep 2026 | 17.4% | 30 |
| 10 Sep 2026 | 15.1% | 26 |
| 3 Sep 2026 | 13.4% | 23 |
| 27 Aug 2026 | 12.2% | 21 |
| 20 Aug 2026 | 11.0% | 19 |
| 13 Aug 2026 | 9.9% | 17 |
| 6 Aug 2026 | 9.3% | 16 |