Tanes
Asturias · Asturias · Cantábrico Occidental
Capacity
34 hm³
Coordinates
43.204°N, 5.402°W
Operator
CHCoc
58.8% full
Current fill
58.8%vs 7 days ago
-5.9%losing
vs 1 year ago
-8.8%year-over-year
7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 34 hm³ |
| Usable capacity | 30.6 hm³ |
| Primary use | Multi-purpose |
| Operator | CHCoc |
| Province | Asturias |
| Autonomous community | Asturias |
| River basin | Cantábrico Occidental |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 43.204, -5.402 · Open in Google Maps
About Tanes
As of October 6, 2026, Tanes is filled to 58.8% of its total capacity, holding roughly 20 hm³ of water out of a maximum 34 hm³. At this level the reservoir is within its normal operating range. Of that total, about 31 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 5.9 percentage points, and it is 8.8 points below its level on the same date a year earlier.
Across the readings we hold for Tanes — 418 data points between October 9, 2018 and October 6, 2026 — the level has ranged from a low of 44.1% (November 11, 2025) to a high of 100.0% (May 19, 2026). On average the reservoir is fullest around June and at its lowest around January.
It is operated by CHCoc primarily for multiple purposes. It lies within the Cantábrico Occidental basin at 43.204°N, 5.402°W.
Key facts
- Current fill level
- 58.8%
- Water stored
- 20 hm³
- Total capacity
- 34 hm³
- Usable capacity
- 31 hm³
- 7-day change
- ▼ 5.9 pts
- Year-on-year
- ▼ 8.8 pts
- Primary use
- Multipurpose
- River basin
- Cantábrico Occidental
- Operator
- CHCoc
- Coordinates
- 43.204°N, 5.402°W
- Last updated
- October 6, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 6 Oct 2026 | 58.8% | 20 |
| 29 Sep 2026 | 64.7% | 22 |
| 22 Sep 2026 | 64.7% | 22 |
| 15 Sep 2026 | 67.6% | 23 |
| 8 Sep 2026 | 70.6% | 24 |
| 1 Sep 2026 | 73.5% | 25 |
| 25 Aug 2026 | 76.5% | 26 |
| 18 Aug 2026 | 79.4% | 27 |
| 11 Aug 2026 | 82.4% | 28 |
| 4 Aug 2026 | 85.3% | 29 |
| 28 Jul 2026 | 88.2% | 30 |
| 21 Jul 2026 | 88.2% | 30 |