Alsa - Mediajo
Cantábrico Occidental
Capacity
22 hm³
Coordinates
0.000°N, 0.000°E
Operator
Cantábrico Occidental
90.9% full
Current fill
90.9%vs 7 days ago
0.0%stable
vs 1 year ago
-4.6%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 July 27, 2026, Alsa - Mediajo is filled to 90.9% of its total capacity, holding roughly 20 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 is 4.6 points below its level on the same date a year earlier.
Across the readings we hold for Alsa - Mediajo — 420 data points between July 17, 2018 and July 27, 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
- 90.9%
- Water stored
- 20 hm³
- Total capacity
- 22 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 4.6 pts
- River basin
- Cantábrico Occidental
- Operator
- Cantábrico Occidental
- Coordinates
- 0.000°N, 0.000°E
- Last updated
- July 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Jul 2026 | 90.9% | 20 |
| 20 Jul 2026 | 90.9% | 20 |
| 14 Jul 2026 | 95.5% | 21 |
| 7 Jul 2026 | 100.0% | 22 |
| 30 Jun 2026 | 100.0% | 22 |
| 23 Jun 2026 | 100.0% | 22 |
| 16 Jun 2026 | 100.0% | 22 |
| 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 |
Frequently asked questions
What is the current water level of Alsa - Mediajo?
As of July 27, 2026, Alsa - Mediajo is at 90.9% of its capacity, holding approximately 20 hm³ of water, according to embalses.net data.
Is Alsa - Mediajo reservoir full?
No. As of July 27, 2026, Alsa - Mediajo is high at 90.9% of its capacity, so it is not full.
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).