Rioseco
Cantábrico Occidental
Capacity
4 hm³
Coordinates
0.000°N, 0.000°E
Operator
Cantábrico Occidental
Current fill
75.0%vs 7 days ago
-25.0%losing
vs 1 year ago
-25.0%year-over-year
7-day trend
↓falling
Technical specifications
| Total capacity | 4 hm³ |
| Usable capacity | 4 hm³ |
| Primary use | — |
| Operator | Cantábrico Occidental |
| River basin | Cantábrico Occidental |
About Rioseco
As of June 9, 2026, Rioseco is filled to 75.0% of its total capacity, holding roughly 3 hm³ of water out of a maximum 4 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 25.0 percentage points, and it is 25.0 points below its level on the same date a year earlier.
Across the readings we hold for Rioseco — 418 data points between June 12, 2018 and June 9, 2026 — the level has ranged from a low of 50.0% (August 7, 2018) to a high of 100.0% (June 12, 2018). On average the reservoir is fullest around June and at its lowest around September.
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
- 75.0%
- Water stored
- 3 hm³
- Total capacity
- 4 hm³
- 7-day change
- ▼ 25.0 pts
- Year-on-year
- ▼ 25.0 pts
- 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 | 75.0% | 3 |
| 2 Jun 2026 | 100.0% | 4 |
| 26 May 2026 | 75.0% | 3 |
| 19 May 2026 | 100.0% | 4 |
| 12 May 2026 | 75.0% | 3 |
| 5 May 2026 | 75.0% | 3 |
| 28 Apr 2026 | 75.0% | 3 |
| 21 Apr 2026 | 75.0% | 3 |
| 14 Apr 2026 | 75.0% | 3 |
| 7 Apr 2026 | 75.0% | 3 |
| 31 Mar 2026 | 75.0% | 3 |
| 24 Mar 2026 | 75.0% | 3 |
Frequently asked questions
What is the current water level of Rioseco?
As of June 9, 2026, Rioseco is at 75.0% of its capacity, holding approximately 3 hm³ of water, according to MITECO data.
Is Rioseco reservoir full?
No. As of June 9, 2026, Rioseco is within its normal operating range at 75.0% of its capacity, so it is not full.
Is the water level at Rioseco rising or falling?
The level at Rioseco is falling — it dropped 25.0 percentage points over the latest week on record.
How much water can Rioseco hold?
Rioseco has a total capacity of 4 hm³.
Where is Rioseco reservoir located?
Rioseco is located in Cantábrico Occidental, Spain, within the Cantábrico Occidental basin (coordinates 0.000°N, 0.000°E).