El Atazar
Community of Madrid · Tajo
Capacity
426 hm³
Coordinates
40.910°N, 3.518°W
Operator
CHT
76.1% full
Current fill
76.1%vs 7 days ago
-1.1%losing
vs 1 year ago
-12.6%year-over-year
7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 426 hm³ |
| Usable capacity | 383.4 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. 40.910, -3.518 · Open in Google Maps
About El Atazar
As of July 27, 2026, El Atazar is filled to 76.1% of its total capacity, holding roughly 324 hm³ of water out of a maximum 426 hm³. At this level the reservoir is within its normal operating range. Of that total, about 383 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (-1.1 pts), and it is 12.6 points below its level on the same date a year earlier.
Across the readings we hold for El Atazar — 420 data points between July 17, 2018 and July 27, 2026 — the level has ranged from a low of 45.8% (October 24, 2023) to a high of 99.8% (May 20, 2025). On average the reservoir is fullest around May and at its lowest around November.
It is operated by CHT primarily for multiple purposes. It lies within the Tajo basin at 40.910°N, 3.518°W.
Key facts
- Current fill level
- 76.1%
- Water stored
- 324 hm³
- Total capacity
- 426 hm³
- Usable capacity
- 383 hm³
- 7-day change
- ▼ 1.1 pts
- Year-on-year
- ▼ 12.6 pts
- Primary use
- Multipurpose
- River basin
- Tajo
- Operator
- CHT
- Coordinates
- 40.910°N, 3.518°W
- Last updated
- July 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Jul 2026 | 76.1% | 324 |
| 20 Jul 2026 | 77.2% | 329 |
| 14 Jul 2026 | 78.4% | 334 |
| 7 Jul 2026 | 79.6% | 339 |
| 30 Jun 2026 | 81.0% | 345 |
| 23 Jun 2026 | 82.6% | 352 |
| 16 Jun 2026 | 84.0% | 358 |
| 9 Jun 2026 | 85.7% | 365 |
| 2 Jun 2026 | 86.6% | 369 |
| 26 May 2026 | 87.3% | 372 |
| 19 May 2026 | 87.1% | 371 |
| 12 May 2026 | 87.1% | 371 |
Frequently asked questions
What is the current water level of El Atazar?
As of July 27, 2026, El Atazar is at 76.1% of its capacity, holding approximately 324 hm³ of water, according to embalses.net data.
Is El Atazar reservoir full?
No. As of July 27, 2026, El Atazar is within its normal operating range at 76.1% of its capacity, so it is not full.
Is the water level at El Atazar rising or falling?
The level at El Atazar has been broadly stable over the latest week on record (-1.1 points).
How much water can El Atazar hold?
El Atazar has a total capacity of 426 hm³, of which about 383 hm³ is usable storage.
Where is El Atazar reservoir located?
El Atazar is located in Community of Madrid, Spain, within the Tajo basin (coordinates 40.910°N, 3.518°W).
What is El Atazar used for?
El Atazar is used primarily for multiple purposes, and is managed by CHT.