Rioseco
Cantábrico Occidental
Capacity
4 hm³
Coordinates
43.226°N, 5.471°W
Operator
Cantábrico Occidental
75.0% full
Current fill
75.0%vs 7 days ago
Stale7-day trend
StaleDrought context
Storage vs October average
104%of normal
75.0% full on 2026-10-13, against an average of 72.1% for October across 9 years of readings (+2.9 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Rioseco had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −0.26). Rain, not storage.
EU drought indicator · 11 October 2026
Alertvegetation stress
The European Drought Observatory's combined reading of rain, soil moisture and vegetation at this point. Watch means rain has been short, Warning that the soil has dried out, Alert that vegetation is visibly stressed; Recovery means the shortfall is easing. Ground conditions, not the reservoir's storage. Spain drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 4 hm³ |
| Primary use | — |
| Operator | Cantábrico Occidental |
| River basin | Cantábrico Occidental |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 43.226°N, 5.471°W · Open in Google Maps
About Rioseco
As of October 13, 2026, Rioseco is filled to 75.0% of its total capacity, holding 3 hm³ of water out of a maximum 4 hm³. The reading is past the freshness window, so it is shown as stale.
The 7-day change is not shown, because the latest reading is past the freshness window.
Across the readings we hold for Rioseco — 418 data points between October 16, 2018 and October 13, 2026 — the level has ranged from a low of 50.0% (October 16, 2018) to a high of 100.0% (October 30, 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 43.226°N, 5.471°W.
Key facts
- Current fill level
- 75.0% of total capacity
- Water stored
- 3 hm³
- Total capacity
- 4 hm³
- 7-day change
- Stale
- River basin
- Cantábrico Occidental
- Operator
- Cantábrico Occidental
- Coordinates
- 43.226°N, 5.471°W
- Last updated
- October 13, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 13 Oct 2026 | 75.0% | 3 |
| 6 Oct 2026 | 75.0% | 3 |
| 29 Sep 2026 | 75.0% | 3 |
| 22 Sep 2026 | 75.0% | 3 |
| 15 Sep 2026 | 75.0% | 3 |
| 8 Sep 2026 | 75.0% | 3 |
| 1 Sep 2026 | 75.0% | 3 |
| 25 Aug 2026 | 75.0% | 3 |
| 18 Aug 2026 | 75.0% | 3 |
| 11 Aug 2026 | 75.0% | 3 |
| 4 Aug 2026 | 75.0% | 3 |
| 28 Jul 2026 | 75.0% | 3 |