Arlanzón
Burgos · Castile and León · Duero
Capacity
22 hm³
Coordinates
42.258°N, 3.340°W
Operator
CHD
68.2% full
Current fill
68.2%vs 7 days ago
-4.5%losing
vs 1 year ago
+9.1%year-over-year
7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 22 hm³ |
| Usable capacity | 19.8 hm³ |
| Primary use | Multi-purpose |
| Operator | CHD |
| Province | Burgos |
| Autonomous community | Castile and León |
| River basin | Duero |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.258, -3.340 · Open in Google Maps
About Arlanzón
As of July 27, 2026, Arlanzón is filled to 68.2% of its total capacity, holding roughly 15 hm³ of water out of a maximum 22 hm³. At this level the reservoir is within its normal operating range. Of that total, about 20 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 4.5 percentage points, and it is 9.1 points above its level on the same date a year earlier.
Across the readings we hold for Arlanzón — 420 data points between July 17, 2018 and July 27, 2026 — the level has ranged from a low of 40.9% (November 4, 2025) to a high of 100.0% (July 17, 2018). On average the reservoir is fullest around May and at its lowest around October.
It is operated by CHD primarily for multiple purposes. It lies within the Duero basin at 42.258°N, 3.340°W.
Key facts
- Current fill level
- 68.2%
- Water stored
- 15 hm³
- Total capacity
- 22 hm³
- Usable capacity
- 20 hm³
- 7-day change
- ▼ 4.5 pts
- Year-on-year
- ▲ 9.1 pts
- Primary use
- Multipurpose
- River basin
- Duero
- Operator
- CHD
- Coordinates
- 42.258°N, 3.340°W
- Last updated
- July 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Jul 2026 | 68.2% | 15 |
| 20 Jul 2026 | 72.7% | 16 |
| 14 Jul 2026 | 72.7% | 16 |
| 7 Jul 2026 | 77.3% | 17 |
| 30 Jun 2026 | 81.8% | 18 |
| 23 Jun 2026 | 86.4% | 19 |
| 16 Jun 2026 | 86.4% | 19 |
| 9 Jun 2026 | 86.4% | 19 |
| 2 Jun 2026 | 86.4% | 19 |
| 26 May 2026 | 86.4% | 19 |
| 19 May 2026 | 86.4% | 19 |
| 12 May 2026 | 81.8% | 18 |
Frequently asked questions
What is the current water level of Arlanzón?
As of July 27, 2026, Arlanzón is at 68.2% of its capacity, holding approximately 15 hm³ of water, according to embalses.net data.
Is Arlanzón reservoir full?
No. As of July 27, 2026, Arlanzón is within its normal operating range at 68.2% of its capacity, so it is not full.
Is the water level at Arlanzón rising or falling?
The level at Arlanzón is falling — it dropped 4.5 percentage points over the latest week on record.
How much water can Arlanzón hold?
Arlanzón has a total capacity of 22 hm³, of which about 20 hm³ is usable storage.
Where is Arlanzón reservoir located?
Arlanzón is located in Burgos, Castile and León, Spain, within the Duero basin (coordinates 42.258°N, 3.340°W).
What is Arlanzón used for?
Arlanzón is used primarily for multiple purposes, and is managed by CHD.