Alcollarin
Cáceres · Extremadura · Guadiana
Capacity
52 hm³
Coordinates
39.248°N, 5.747°W
Operator
CHSU
36.5% full
Current fill
36.5%vs 7 days ago
-2.0%losing
vs 1 year ago
+36.5%year-over-year
7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 52 hm³ |
| Usable capacity | 46.8 hm³ |
| Primary use | Multi-purpose |
| Operator | CHSU |
| Province | Cáceres |
| Autonomous community | Extremadura |
| River basin | Guadiana |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 39.248, -5.747 · Open in Google Maps
About Alcollarin
As of September 7, 2026, Alcollarin is filled to 36.5% of its total capacity, holding roughly 19 hm³ of water out of a maximum 52 hm³. At this level the reservoir is low. Of that total, about 47 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 2.0 percentage points, and it is 36.5 points above its level on the same date a year earlier.
Across the readings we hold for Alcollarin — 258 data points between October 5, 2021 and September 7, 2026 — the level has ranged from a low of 0.0% (September 9, 2025) to a high of 78.8% (April 16, 2024). On average the reservoir is fullest around April and at its lowest around November.
It is operated by CHSU primarily for multiple purposes. It lies within the Guadiana basin at 39.248°N, 5.747°W.
Key facts
- Current fill level
- 36.5%
- Water stored
- 19 hm³
- Total capacity
- 52 hm³
- Usable capacity
- 47 hm³
- 7-day change
- ▼ 2.0 pts
- Year-on-year
- ▲ 36.5 pts
- Primary use
- Multipurpose
- River basin
- Guadiana
- Operator
- CHSU
- Coordinates
- 39.248°N, 5.747°W
- Last updated
- September 7, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 7 Sep 2026 | 36.5% | 19 |
| 1 Sep 2026 | 38.5% | 20 |
| 25 Aug 2026 | 38.5% | 20 |
| 18 Aug 2026 | 38.5% | 20 |
| 11 Aug 2026 | 38.5% | 20 |
| 4 Aug 2026 | 38.5% | 20 |
| 28 Jul 2026 | 38.5% | 20 |
| 21 Jul 2026 | 40.4% | 21 |
| 14 Jul 2026 | 40.4% | 21 |
| 7 Jul 2026 | 40.4% | 21 |
| 30 Jun 2026 | 40.4% | 21 |
| 23 Jun 2026 | 40.4% | 21 |