San Antón
Baztan-Bidasoa · Navarre · Cantábrico Oriental
Capacity
5 hm³
Coordinates
43.275°N, 1.773°W
Operator
CHCo
60.0% full
Current fill
60.0%vs 13 Oct 2026
0.0 ppstable
vs 1 year ago
-20.0 ppyear-over-year
Trend
→stable
Drought context
Storage vs October average
75%of normal
60.0% full on 2026-10-19, against an average of 80.4% for October across 9 years of readings (-20.4 points).
Rain over the last three months · 11 October 2026
Moderately dry
In the three months to 11 October 2026 the area around San Antón had well below normal rain, a shortfall seen about one year in six. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −1.17). Rain, not storage.
EU drought indicator · 11 October 2026
Warningsoil-moisture deficit
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 | 5 hm³ |
| Primary use | Multi-purpose |
| Operator | CHCo |
| Province | Baztan-Bidasoa |
| Region | Navarre |
| River basin | Cantábrico Oriental |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 43.275°N, 1.773°W · Open in Google Maps
About San Antón
As of October 19, 2026, San Antón is filled to 60.0% of its total capacity, holding 3 hm³ of water out of a maximum 5 hm³. At this level the reservoir is within its normal operating range.
Since October 13, 2026 the fill level has held broadly steady (+0.0 pp), and it is 20.0 points below its level on the same date a year earlier.
Across the readings we hold for San Antón — 419 data points between October 16, 2018 and October 19, 2026 — the level has ranged from a low of 60.0% (October 13, 2026) to a high of 100.0% (December 25, 2018). On average the reservoir is fullest around January and at its lowest around September.
It is operated by CHCo primarily for multiple purposes. It lies within the Cantábrico Oriental basin at 43.275°N, 1.773°W.
Key facts
- Current fill level
- 60.0% of total capacity
- Water stored
- 3 hm³
- Total capacity
- 5 hm³
- Change since October 13, 2026
- No change
- Year-on-year
- ▼ 20.0 pp
- Primary use
- Multipurpose
- River basin
- Cantábrico Oriental
- Operator
- CHCo
- Coordinates
- 43.275°N, 1.773°W
- Last updated
- October 19, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 19 Oct 2026 | 60.0% | 3 |
| 13 Oct 2026 | 60.0% | 3 |
| 6 Oct 2026 | 80.0% | 4 |
| 29 Sep 2026 | 80.0% | 4 |
| 22 Sep 2026 | 80.0% | 4 |
| 15 Sep 2026 | 80.0% | 4 |
| 8 Sep 2026 | 80.0% | 4 |
| 1 Sep 2026 | 80.0% | 4 |
| 25 Aug 2026 | 80.0% | 4 |
| 18 Aug 2026 | 80.0% | 4 |
| 11 Aug 2026 | 80.0% | 4 |
| 4 Aug 2026 | 80.0% | 4 |