Alloz
Estellerria · Navarre · Ebro
Capacity
66 hm³
Coordinates
42.724°N, 1.942°W
Operator
CHE
50.0% full
Current fill
50.0%vs 7 days ago
-6.1%losing
vs 1 year ago
-15.2%year-over-year
7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 66 hm³ |
| Usable capacity | 59.4 hm³ |
| Primary use | Multi-purpose |
| Operator | CHE |
| Province | Estellerria |
| Autonomous community | Navarre |
| River basin | Ebro |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.724, -1.942 · Open in Google Maps
About Alloz
As of September 7, 2026, Alloz is filled to 50.0% of its total capacity, holding roughly 33 hm³ of water out of a maximum 66 hm³. At this level the reservoir is within its normal operating range. Of that total, about 59 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 6.1 percentage points, and it is 15.2 points below its level on the same date a year earlier.
Across the readings we hold for Alloz — 419 data points between September 4, 2018 and September 7, 2026 — the level has ranged from a low of 16.7% (November 2, 2021) to a high of 93.9% (May 20, 2025). On average the reservoir is fullest around June and at its lowest around November.
It is operated by CHE primarily for multiple purposes. It lies within the Ebro basin at 42.724°N, 1.942°W.
Key facts
- Current fill level
- 50.0%
- Water stored
- 33 hm³
- Total capacity
- 66 hm³
- Usable capacity
- 59 hm³
- 7-day change
- ▼ 6.1 pts
- Year-on-year
- ▼ 15.2 pts
- Primary use
- Multipurpose
- River basin
- Ebro
- Operator
- CHE
- Coordinates
- 42.724°N, 1.942°W
- Last updated
- September 7, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 7 Sep 2026 | 50.0% | 33 |
| 1 Sep 2026 | 56.1% | 37 |
| 25 Aug 2026 | 60.6% | 40 |
| 18 Aug 2026 | 66.7% | 44 |
| 11 Aug 2026 | 71.2% | 47 |
| 4 Aug 2026 | 75.8% | 50 |
| 28 Jul 2026 | 77.3% | 51 |
| 21 Jul 2026 | 77.3% | 51 |
| 14 Jul 2026 | 80.3% | 53 |
| 7 Jul 2026 | 81.8% | 54 |
| 30 Jun 2026 | 83.3% | 55 |
| 23 Jun 2026 | 83.3% | 55 |