Santillana
Community of Madrid · Tajo
Capacity
91 hm³
Coordinates
40.725°N, 3.831°W
Operator
CHT
73.6% full
Current fill
73.6%vs 7 days ago
-2.2%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 | 91 hm³ |
| Usable capacity | 81.9 hm³ |
| Primary use | Multi-purpose |
| Operator | CHT |
| Autonomous community | Community of Madrid |
| River basin | Tajo |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.725, -3.831 · Open in Google Maps
About Santillana
As of July 27, 2026, Santillana is filled to 73.6% of its total capacity, holding roughly 67 hm³ of water out of a maximum 91 hm³. At this level the reservoir is within its normal operating range. Of that total, about 82 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 2.2 percentage points, and it is 8.8 points below its level on the same date a year earlier.
Across the readings we hold for Santillana — 420 data points between July 17, 2018 and July 27, 2026 — the level has ranged from a low of 31.9% (November 12, 2019) to a high of 100.0% (March 25, 2025). On average the reservoir is fullest around April and at its lowest around October.
It is operated by CHT primarily for multiple purposes. It lies within the Tajo basin at 40.725°N, 3.831°W.
Key facts
- Current fill level
- 73.6%
- Water stored
- 67 hm³
- Total capacity
- 91 hm³
- Usable capacity
- 82 hm³
- 7-day change
- ▼ 2.2 pts
- Year-on-year
- ▼ 8.8 pts
- Primary use
- Multipurpose
- River basin
- Tajo
- Operator
- CHT
- Coordinates
- 40.725°N, 3.831°W
- Last updated
- July 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Jul 2026 | 73.6% | 67 |
| 20 Jul 2026 | 75.8% | 69 |
| 14 Jul 2026 | 81.3% | 74 |
| 7 Jul 2026 | 81.3% | 74 |
| 30 Jun 2026 | 82.4% | 75 |
| 23 Jun 2026 | 84.6% | 77 |
| 16 Jun 2026 | 86.8% | 79 |
| 9 Jun 2026 | 89.0% | 81 |
| 2 Jun 2026 | 91.2% | 83 |
| 26 May 2026 | 92.3% | 84 |
| 19 May 2026 | 93.4% | 85 |
| 12 May 2026 | 94.5% | 86 |
Frequently asked questions
What is the current water level of Santillana?
As of July 27, 2026, Santillana is at 73.6% of its capacity, holding approximately 67 hm³ of water, according to embalses.net data.
Is Santillana reservoir full?
No. As of July 27, 2026, Santillana is within its normal operating range at 73.6% of its capacity, so it is not full.
Is the water level at Santillana rising or falling?
The level at Santillana is falling — it dropped 2.2 percentage points over the latest week on record.
How much water can Santillana hold?
Santillana has a total capacity of 91 hm³, of which about 82 hm³ is usable storage.
Where is Santillana reservoir located?
Santillana is located in Community of Madrid, Spain, within the Tajo basin (coordinates 40.725°N, 3.831°W).
What is Santillana used for?
Santillana is used primarily for multiple purposes, and is managed by CHT.