Alsa - Mediajo
Cantábrico Occidental
Capacity
22 hm³
Coordinates
0.000°N, 0.000°E
Operator
Cantábrico Occidental
Current fill
100.0%vs 7 days ago
0.0%stable
vs 1 year ago
0.0%year-over-year
7-day trend
→stable
Technical specifications
| Total capacity | 22 hm³ |
| Usable capacity | 22 hm³ |
| Primary use | — |
| Operator | Cantábrico Occidental |
| River basin | Cantábrico Occidental |
About Alsa - Mediajo
As of June 9, 2026, Alsa - Mediajo is filled to 100.0% of its total capacity, holding roughly 22 hm³ of water out of a maximum 22 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Alsa - Mediajo — 418 data points between June 12, 2018 and June 9, 2026 — the level has ranged from a low of 63.6% (November 8, 2022) to a high of 104.5% (March 31, 2026). On average the reservoir is fullest around May and at its lowest around November.
It is operated by Cantábrico Occidental. It lies within the Cantábrico Occidental basin at 0.000°N, 0.000°E.
Key facts
- Current fill level
- 100.0%
- Water stored
- 22 hm³
- Total capacity
- 22 hm³
- 7-day change
- No change
- Year-on-year
- No change
- River basin
- Cantábrico Occidental
- Operator
- Cantábrico Occidental
- Coordinates
- 0.000°N, 0.000°E
- Last updated
- June 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Jun 2026 | 100.0% | 22 |
| 2 Jun 2026 | 100.0% | 22 |
| 26 May 2026 | 100.0% | 22 |
| 19 May 2026 | 100.0% | 22 |
| 12 May 2026 | 100.0% | 22 |
| 5 May 2026 | 95.5% | 21 |
| 28 Apr 2026 | 95.5% | 21 |
| 21 Apr 2026 | 100.0% | 22 |
| 14 Apr 2026 | 100.0% | 22 |
| 7 Apr 2026 | 100.0% | 22 |
| 31 Mar 2026 | 104.5% | 23 |
| 24 Mar 2026 | 100.0% | 22 |
Frequently asked questions
What is the current water level of Alsa - Mediajo?
As of June 9, 2026, Alsa - Mediajo is at 100.0% of its capacity, holding approximately 22 hm³ of water, according to MITECO data.
Is Alsa - Mediajo reservoir full?
Alsa - Mediajo is essentially full, sitting at 100.0% of capacity as of June 9, 2026.
Is the water level at Alsa - Mediajo rising or falling?
The level at Alsa - Mediajo has been broadly stable over the latest week on record (0.0 points).
How much water can Alsa - Mediajo hold?
Alsa - Mediajo has a total capacity of 22 hm³.
Where is Alsa - Mediajo reservoir located?
Alsa - Mediajo is located in Cantábrico Occidental, Spain, within the Cantábrico Occidental basin (coordinates 0.000°N, 0.000°E).