Cernadilla
Zamora · Castile and León · Duero
Capacity
255 hm³
Coordinates
42.008°N, 6.506°W
Operator
CHD
48.2% full
Current fill
48.2%vs 7 days ago
-4.0%losing
vs 1 year ago
-9.4%year-over-year
7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 255 hm³ |
| Usable capacity | 229.5 hm³ |
| Primary use | Multi-purpose |
| Operator | CHD |
| Province | Zamora |
| Autonomous community | Castile and León |
| River basin | Duero |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.008, -6.506 · Open in Google Maps
About Cernadilla
As of July 27, 2026, Cernadilla is filled to 48.2% of its total capacity, holding roughly 123 hm³ of water out of a maximum 255 hm³. At this level the reservoir is within its normal operating range. Of that total, about 230 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 4.0 percentage points, and it is 9.4 points below its level on the same date a year earlier.
Across the readings we hold for Cernadilla — 420 data points between July 17, 2018 and July 27, 2026 — the level has ranged from a low of 9.8% (August 30, 2022) to a high of 93.7% (May 14, 2024). On average the reservoir is fullest around May and at its lowest around October.
It is operated by CHD primarily for multiple purposes. It lies within the Duero basin at 42.008°N, 6.506°W.
Key facts
- Current fill level
- 48.2%
- Water stored
- 123 hm³
- Total capacity
- 255 hm³
- Usable capacity
- 230 hm³
- 7-day change
- ▼ 4.0 pts
- Year-on-year
- ▼ 9.4 pts
- Primary use
- Multipurpose
- River basin
- Duero
- Operator
- CHD
- Coordinates
- 42.008°N, 6.506°W
- Last updated
- July 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Jul 2026 | 48.2% | 123 |
| 20 Jul 2026 | 52.2% | 133 |
| 14 Jul 2026 | 56.9% | 145 |
| 7 Jul 2026 | 61.2% | 156 |
| 30 Jun 2026 | 64.3% | 164 |
| 23 Jun 2026 | 68.2% | 174 |
| 16 Jun 2026 | 72.2% | 184 |
| 9 Jun 2026 | 72.9% | 186 |
| 2 Jun 2026 | 75.3% | 192 |
| 26 May 2026 | 76.9% | 196 |
| 19 May 2026 | 78.8% | 201 |
| 12 May 2026 | 76.5% | 195 |
Frequently asked questions
What is the current water level of Cernadilla?
As of July 27, 2026, Cernadilla is at 48.2% of its capacity, holding approximately 123 hm³ of water, according to embalses.net data.
Is Cernadilla reservoir full?
No. As of July 27, 2026, Cernadilla is within its normal operating range at 48.2% of its capacity, so it is not full.
Is the water level at Cernadilla rising or falling?
The level at Cernadilla is falling — it dropped 4.0 percentage points over the latest week on record.
How much water can Cernadilla hold?
Cernadilla has a total capacity of 255 hm³, of which about 230 hm³ is usable storage.
Where is Cernadilla reservoir located?
Cernadilla is located in Zamora, Castile and León, Spain, within the Duero basin (coordinates 42.008°N, 6.506°W).
What is Cernadilla used for?
Cernadilla is used primarily for multiple purposes, and is managed by CHD.