Ulldecona
Castelló / Castellón · Valencian Community · Júcar
Capacity
11 hm³
Coordinates
40.672°N, 0.233°E
Operator
CHJ
72.7% full
Current fill
72.7%vs 7 days ago
0.0%stable
vs 1 year ago
0.0%year-over-year
7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 11 hm³ |
| Usable capacity | 9.9 hm³ |
| Primary use | Multi-purpose |
| Operator | CHJ |
| Province | Castelló / Castellón |
| Autonomous community | Valencian Community |
| River basin | Júcar |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.672, 0.233 · Open in Google Maps
About Ulldecona
As of September 7, 2026, Ulldecona is filled to 72.7% of its total capacity, holding roughly 8 hm³ of water out of a maximum 11 hm³. At this level the reservoir is within its normal operating range. Of that total, about 10 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Ulldecona — 419 data points between September 4, 2018 and September 7, 2026 — the level has ranged from a low of 0.0% (September 4, 2018) to a high of 81.8% (November 27, 2018). On average the reservoir is fullest around March and at its lowest around October.
It is operated by CHJ primarily for multiple purposes. It lies within the Júcar basin at 40.672°N, 0.233°E.
Key facts
- Current fill level
- 72.7%
- Water stored
- 8 hm³
- Total capacity
- 11 hm³
- Usable capacity
- 10 hm³
- 7-day change
- No change
- Year-on-year
- No change
- Primary use
- Multipurpose
- River basin
- Júcar
- Operator
- CHJ
- Coordinates
- 40.672°N, 0.233°E
- Last updated
- September 7, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 7 Sep 2026 | 72.7% | 8 |
| 1 Sep 2026 | 72.7% | 8 |
| 25 Aug 2026 | 81.8% | 9 |
| 18 Aug 2026 | 81.8% | 9 |
| 11 Aug 2026 | 81.8% | 9 |
| 4 Aug 2026 | 81.8% | 9 |
| 28 Jul 2026 | 81.8% | 9 |
| 21 Jul 2026 | 81.8% | 9 |
| 14 Jul 2026 | 81.8% | 9 |
| 7 Jul 2026 | 81.8% | 9 |
| 30 Jun 2026 | 81.8% | 9 |
| 23 Jun 2026 | 81.8% | 9 |