Castro
Zamora · Castile and León · Duero
Capacity
27 hm³
Coordinates
41.577°N, 6.184°W
Operator
CHD
92.6% full
Current fill
92.6%vs 7 days ago
+3.7%gaining
vs 1 year ago
+3.7%year-over-year
7-day trend
↑rising
Drought context
Storage vs October average
102%of normal
92.6% full on 2026-10-06, against an average of 90.9% for October across 9 years of readings (+1.7 points).
Rain over the last three months · 21 September 2026
Near normal
In the three months to 21 September 2026 the area around Castro had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −0.40). Rain, not storage.
EU drought indicator · 11 September 2026
Noneno drought signal
The European Drought Observatory's combined reading of rain, soil moisture and vegetation at this point. Watch means rain has been short, Warning that the soil has dried out, Alert that vegetation is visibly stressed; Recovery means the shortfall is easing. Ground conditions, not the reservoir's storage. Spain drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 27 hm³ |
| Usable capacity | 24.3 hm³ |
| Primary use | Multi-purpose |
| Operator | CHD |
| Province | Zamora |
| Autonomous community | Castile and León |
| River basin | Duero |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.577, -6.184 · Open in Google Maps
About Castro
As of October 6, 2026, Castro is filled to 92.6% of its total capacity, holding roughly 25 hm³ of water out of a maximum 27 hm³. At this level the reservoir is high. Of that total, about 24 hm³ is usable (live) storage.
Over the most recent week on record the fill level has risen by 3.7 percentage points, and it is 3.7 points above its level on the same date a year earlier.
Across the readings we hold for Castro — 418 data points between October 9, 2018 and October 6, 2026 — the level has ranged from a low of 63.0% (February 4, 2020) to a high of 96.3% (May 14, 2019). On average the reservoir is fullest around January and at its lowest around September.
It is operated by CHD primarily for multiple purposes. It lies within the Duero basin at 41.577°N, 6.184°W.
Key facts
- Current fill level
- 92.6%
- Water stored
- 25 hm³
- Total capacity
- 27 hm³
- Usable capacity
- 24 hm³
- 7-day change
- ▲ 3.7 pts
- Year-on-year
- ▲ 3.7 pts
- Primary use
- Multipurpose
- River basin
- Duero
- Operator
- CHD
- Coordinates
- 41.577°N, 6.184°W
- Last updated
- October 6, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 6 Oct 2026 | 92.6% | 25 |
| 29 Sep 2026 | 88.9% | 24 |
| 22 Sep 2026 | 88.9% | 24 |
| 15 Sep 2026 | 92.6% | 25 |
| 8 Sep 2026 | 92.6% | 25 |
| 1 Sep 2026 | 88.9% | 24 |
| 25 Aug 2026 | 88.9% | 24 |
| 18 Aug 2026 | 88.9% | 24 |
| 11 Aug 2026 | 88.9% | 24 |
| 4 Aug 2026 | 88.9% | 24 |
| 28 Jul 2026 | 85.2% | 23 |
| 21 Jul 2026 | 88.9% | 24 |