La Jarosa
Community of Madrid · Tajo
Capacity
7 hm³
Coordinates
40.668°N, 4.123°W
Operator
CHT
42.9% full
Current fill
42.9%vs 13 Oct 2026
0.0 ppstable
vs 1 year ago
-14.2 ppyear-over-year
Trend
→stable
Drought context
Storage vs October average
83%of normal
42.9% full on 2026-10-19, against an average of 51.5% for October across 9 years of readings (-8.6 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Jarosa, La had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −0.90). Rain, not storage.
EU drought indicator · 11 October 2026
Recoverysoil moisture recovering
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 | 7 hm³ |
| Primary use | Multi-purpose |
| Operator | CHT |
| Region | Community of Madrid |
| River basin | Tajo |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.668°N, 4.123°W · Open in Google Maps
About La Jarosa
As of October 19, 2026, La Jarosa is filled to 42.9% of its total capacity, holding 3 hm³ of water out of a maximum 7 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 14.2 points below its level on the same date a year earlier.
Across the readings we hold for La Jarosa — 419 data points between October 16, 2018 and October 19, 2026 — the level has ranged from a low of 14.3% (October 15, 2019) to a high of 100.0% (March 9, 2021). On average the reservoir is fullest around April and at its lowest around September.
It is operated by CHT primarily for multiple purposes. It lies within the Tajo basin at 40.668°N, 4.123°W.
Key facts
- Current fill level
- 42.9% of total capacity
- Water stored
- 3 hm³
- Total capacity
- 7 hm³
- Change since October 13, 2026
- No change
- Year-on-year
- ▼ 14.2 pp
- Primary use
- Multipurpose
- River basin
- Tajo
- Operator
- CHT
- Coordinates
- 40.668°N, 4.123°W
- Last updated
- October 19, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 19 Oct 2026 | 42.9% | 3 |
| 13 Oct 2026 | 42.9% | 3 |
| 6 Oct 2026 | 42.9% | 3 |
| 29 Sep 2026 | 42.9% | 3 |
| 22 Sep 2026 | 42.9% | 3 |
| 15 Sep 2026 | 42.9% | 3 |
| 8 Sep 2026 | 42.9% | 3 |
| 1 Sep 2026 | 42.9% | 3 |
| 25 Aug 2026 | 42.9% | 3 |
| 18 Aug 2026 | 42.9% | 3 |
| 11 Aug 2026 | 42.9% | 3 |
| 4 Aug 2026 | 42.9% | 3 |