Reservoir · Andhra Pradesh · India · CWC
Subsidiary Reservoir -I
20.0% full
Gross capacity
2.1 TMC (60 MCM)
Live capacity
1.8 TMC (52 MCM)
River
Pennar
Basin
Pennar
Operator
AP Water Resources Dept
Coordinates
14.846°N, 78.714°E
Last updated
2026-10-14
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 20% full, holding 0.42 TMC (12 MCM).
- Gross capacity
- 2.1 TMC (60 MCM)
- Live capacity
- 1.8 TMC (52 MCM)
- Current storage
- 0.42 TMC (12 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
20.0%vs 7 days ago
0.0%stable
vs 1 year ago
N/A7-day trend
→stable
Drought context
Rain over the last three months · 21 September 2026
Moderately dry
In the three months to 21 September 2026 the area around Subsidiary Reservoir -I had well below normal rain, a shortfall seen about one year in six. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −1.37). Rain, not storage. India drought figures →
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. 14.846, 78.714 · Open in Google Maps
About Subsidiary Reservoir -I
As of October 14, 2026, Subsidiary Reservoir -I is filled to 20.0% of its total capacity, holding 0.42 TMC (12 MCM) of a gross 2.1 TMC (60 MCM). At this level the reservoir is low. Of that total, 1.8 TMC (52 MCM) is live storage.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts).
Across the readings we hold for Subsidiary Reservoir -I — 1 data points between October 14, 2026 and October 14, 2026 — the level has ranged from a low of 20.0% (October 14, 2026) to a high of 20.0% (October 14, 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
- 20.0%
- Water stored
- 0.42 TMC (12 MCM)
- Total capacity
- 2.1 TMC (60 MCM)
- Usable capacity
- 1.8 TMC (52 MCM)
- 7-day change
- No change
- River
- Pennar
- River basin
- Pennar
- Operator
- AP Water Resources Dept
- Coordinates
- 14.846°N, 78.714°E
- Last updated
- October 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Oct 2026 | 20.0% | 12 |