Reservoir · Andhra Pradesh · India · AP-WRIMS
Subsidiary Reservoir -I
16.9% of gross capacity
Gross capacity
2.1 TMC (60 MCM)
Live capacity
1.8 TMC (52 MCM)
Basin
Pennar
Operator
AP Water Resources Dept
Coordinates
14.846°N, 78.714°E
Last updated
2026-10-27
Capacity in TMC
Subsidiary Reservoir -I has a gross capacity of 2.1 TMC (60 MCM), of which 1.8 TMC (52 MCM) is live storage; it is currently at 16.9% of gross capacity, holding 0.35 TMC (10 MCM) (19.2% of live capacity).
- Gross capacity
- 2.1 TMC (60 MCM)
- Live capacity
- 1.8 TMC (52 MCM)
- Current storage
- 0.35 TMC (10 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 AP-WRIMS, which publishes million cubic metres. The percentage is labelled live or gross only when the stored volume matches that capacity.
Current fill
16.9%vs 22 Oct 2026
-1.3 pplosing
vs 1 year ago
N/ATrend
↓falling
Drought context
Rain over the last three months · 11 October 2026
Extremely dry
In the three months to 11 October 2026 the area around Subsidiary Reservoir -I had extremely little rain for the season, a shortfall seen about one year in forty. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −2.02). Rain, not storage. India drought figures →
Weekly storage
Fill history — multi-year
About this reservoir
Data source
official
Storage data: AP-WRIMS.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 14.846°N, 78.714°E · Open in Google Maps
About Subsidiary Reservoir -I
As of October 27, 2026, Subsidiary Reservoir -I is filled to 16.9% of its gross capacity, holding 0.35 TMC (10 MCM) of a gross 2.1 TMC (60 MCM). At this level the reservoir is critically low. Of that total, 1.8 TMC (52 MCM) is live storage.
Since October 22, 2026 the fill level has fallen by 1.3 percentage points.
Across the readings we hold for Subsidiary Reservoir -I — 13 data points between July 2, 2026 and October 27, 2026 — the level has ranged from a low of 16.9% (October 27, 2026) to a high of 34.0% (July 2, 2026).
It is operated by AP Water Resources Dept. It lies within the Pennar basin at 14.846°N, 78.714°E.
Key facts
- Current fill level
- 16.9% of total capacity
- Water stored
- 0.35 TMC (10 MCM)
- Total capacity
- 2.1 TMC (60 MCM)
- Usable capacity
- 1.8 TMC (52 MCM)
- Change since October 22, 2026
- ▼ 1.3 pp
- River basin
- Pennar
- Operator
- AP Water Resources Dept
- Coordinates
- 14.846°N, 78.714°E
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 16.9% | 10 |
| 22 Oct 2026 | 18.2% | 11 |
| 16 Sep 2026 | 21.9% | 13 |
| 9 Sep 2026 | 22.4% | 14 |
| 2 Sep 2026 | 22.9% | 14 |
| 27 Aug 2026 | 23.6% | 14 |
| 20 Aug 2026 | 24.4% | 15 |
| 13 Aug 2026 | 26.1% | 16 |
| 4 Aug 2026 | 31.6% | 19 |
| 29 Jul 2026 | 32.0% | 19 |
| 22 Jul 2026 | 32.5% | 20 |
| 15 Jul 2026 | 33.0% | 20 |