Jarrama reservoir

Huelva · Andalucía

Tinto, Odiel y Piedras basin Reservoirs in Andalucía

Province: Huelva
Basin: Tinto, Odiel y Piedras
River: Jarrama
Dam: Embankment, clay core · 1999

60.5%

Current level

26 hm³

Stored water

43 hm³

Total capacity

0.0 hm³

Weekly change

-2.0 hm³

Vs. 2025

-1.2 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Jarrama reservoir (embalse de Jarrama), in the Tinto, Odiel y Piedras basin and linked to Nerva, Madroño, Huelva and Andalucía, is at 60.5% of its capacity, holding 26 hm³ against a maximum capacity of 43 hm³. It is currently steady in the latest update.

Compared with 2025: below (-4.7 points). Compared with the recent historical mean: below (-2.8 points).

Its main uses include water supply and irrigation.

References
Reference	Level	Difference
Previous week	60.5%	0.0 pts
Same week 2025	65.1%	-4.7 pts
10-year mean	63.3%	-2.8 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Nerva, Madroño
River: Jarrama
Dam type: Embankment, clay core
Year built: 1999
Surface area: 342 ha
Upstream: — no data
Downstream: No

Recorded uses

Water supply
Irrigation
Fishing
Boating
Swimming

Not recorded: electricity, industrial, picnic, restaurants.

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET