Reservoirs in the Tinto, Odiel y Piedras basin

On 6 October 2026 the 7 reservoirs of the Tinto, Odiel y Piedras basin held 145 hm³ of water, 63.3 percent of their capacity of 229 hm³. That is 1.7 percentage points less than a week earlier. A year earlier, on 7 October 2025, they held 65.9 percent. That share is within the normal range for the date. We follow 7 reservoirs in the Tinto, Odiel y Piedras basin. Of the 7 reservoirs with a current reading and a normal range for the date, 1 reservoir reads below that range and none above it. Furthest below normal: Los Machos. Data: 6 October 2026.

The last 12 months, against the normal range for each week

Level
Normal range for the date
Median for the date
A year earlier

Share of capacity full of the reservoirs of the Tinto, Odiel y Piedras basin in each weekly bulletin from 6 October 2025 to 6 October 2026, with the normal range for each week and the same weeks a year earlier.

Table: The last 12 months, against the normal range for each week

Week starting	Share full (percent)	Normal range	Median	A year earlier
6 October 2025	65.9 percent	45.4 percent to 74.7 percent	68.3 percent	70.3 percent
13 October 2025	63.8 percent	45.4 percent to 74.2 percent	68.1 percent	70.3 percent
20 October 2025	63.3 percent	45.1 percent to 75.6 percent	68.6 percent	71.2 percent
27 October 2025	62.5 percent	55.7 percent to 76.8 percent	68.6 percent	70.3 percent
3 November 2025	64.2 percent	56.6 percent to 78.6 percent	68.6 percent	76.4 percent
10 November 2025	63.8 percent	58.1 percent to 82.8 percent	69.9 percent	76.4 percent
17 November 2025	71.6 percent	58.1 percent to 84.4 percent	71.2 percent	80.4 percent
24 November 2025	73.8 percent	57.9 percent to 92.5 percent	72.1 percent	81.7 percent
1 December 2025	73.4 percent	57.6 percent to 94.0 percent	73.4 percent	82.5 percent
8 December 2025	72.9 percent	57.9 percent to 94.7 percent	73.8 percent	83.8 percent
15 December 2025	79.9 percent	59.0 percent to 94.7 percent	74.7 percent	83.8 percent
22 December 2025	77.3 percent	59.6 percent to 94.2 percent	76.4 percent	83.4 percent
29 December 2025	85.6 percent	59.9 percent to 94.4 percent	78.6 percent	82.5 percent
5 January 2026	89.5 percent	59.7 percent to 97.3 percent	78.6 percent	82.1 percent
12 January 2026	89.1 percent	59.0 percent to 98.0 percent	79.6 percent	82.1 percent
19 January 2026	90.4 percent	59.1 percent to 98.7 percent	80.1 percent	82.1 percent
26 January 2026	93.5 percent	58.1 percent to 98.4 percent	80.4 percent	92.1 percent
2 February 2026	94.8 percent	58.1 percent to 98.4 percent	81.0 percent	92.1 percent
9 February 2026	95.2 percent	57.5 percent to 98.3 percent	81.0 percent	91.7 percent
16 February 2026	93.9 percent	58.5 percent to 97.8 percent	81.2 percent	92.6 percent
23 February 2026	92.6 percent	60.8 percent to 97.8 percent	81.7 percent	93.0 percent
2 March 2026	91.7 percent	60.8 percent to 97.4 percent	82.5 percent	94.3 percent
9 March 2026	91.3 percent	61.3 percent to 97.4 percent	83.4 percent	94.3 percent
16 March 2026	90.8 percent	61.9 percent to 96.8 percent	83.4 percent	94.8 percent
23 March 2026	90.4 percent	61.0 percent to 94.8 percent	83.4 percent	94.3 percent
30 March 2026	89.5 percent	60.8 percent to 94.6 percent	84.3 percent	92.1 percent
6 April 2026	89.5 percent	60.3 percent to 94.6 percent	85.2 percent	93.0 percent
13 April 2026	88.2 percent	59.4 percent to 94.6 percent	85.2 percent	91.7 percent
20 April 2026	88.2 percent	59.1 percent to 94.6 percent	85.2 percent	92.1 percent
27 April 2026	87.8 percent	59.1 percent to 93.9 percent	85.2 percent	91.7 percent
4 May 2026	87.3 percent	59.1 percent to 93.5 percent	85.2 percent	92.1 percent
11 May 2026	86.9 percent	58.7 percent to 92.6 percent	85.6 percent	92.1 percent
18 May 2026	87.8 percent	58.7 percent to 92.4 percent	85.6 percent	91.7 percent
25 May 2026	86.9 percent	59.1 percent to 92.4 percent	85.6 percent	90.4 percent
1 June 2026	86.5 percent	58.7 percent to 92.0 percent	85.2 percent	89.1 percent
8 June 2026	84.7 percent	58.6 percent to 92.1 percent	83.8 percent	88.2 percent
15 June 2026	83.4 percent	58.2 percent to 91.3 percent	82.5 percent	88.2 percent
22 June 2026	82.5 percent	58.1 percent to 90.3 percent	82.1 percent	86.9 percent
29 June 2026	81.7 percent	58.1 percent to 89.5 percent	81.7 percent	86.0 percent
6 July 2026	80.8 percent	57.2 percent to 87.7 percent	79.9 percent	86.0 percent
13 July 2026	79.5 percent	57.0 percent to 86.5 percent	78.6 percent	85.2 percent
20 July 2026	78.6 percent	56.6 percent to 85.2 percent	77.3 percent	82.5 percent
27 July 2026	77.3 percent	55.6 percent to 83.8 percent	76.0 percent	81.7 percent
3 August 2026	76.4 percent	54.9 percent to 82.9 percent	75.1 percent	79.9 percent
10 August 2026	75.1 percent	54.4 percent to 82.0 percent	73.8 percent	78.6 percent
17 August 2026	74.2 percent	54.3 percent to 80.3 percent	72.5 percent	77.7 percent
24 August 2026	73.4 percent	52.9 percent to 79.9 percent	71.6 percent	76.0 percent
31 August 2026	72.5 percent	51.8 percent to 79.4 percent	70.3 percent	75.1 percent
7 September 2026	71.6 percent	50.3 percent to 79.0 percent	69.9 percent	74.2 percent
14 September 2026	69.9 percent	49.1 percent to 78.3 percent	69.0 percent	71.2 percent
21 September 2026	67.7 percent	48.1 percent to 75.9 percent	69.0 percent	69.4 percent
28 September 2026	65.1 percent	45.3 percent to 75.1 percent	69.0 percent	67.7 percent
5 October 2026	63.3 percent	44.6 percent to 74.7 percent	68.1 percent	65.9 percent

1 place below normal and 0 places above

Furthest below normal

Los MachosLos Machos
3 hm³6 October 2026
in the lowest 10 percent for the date

Places in Tinto, Odiel y Piedras basin

Place	Reading	Against normal for the date	Change in a week
Corumbel BajoCorumbel Bajo	13 hm³6 October 2026	within the normal range for the date	0 hm³
JarramaJarrama	26 hm³6 October 2026	within the normal range for the date	0 hm³
Los MachosLos Machos	3 hm³6 October 2026	in the lowest 10 percent for the date	0 hm³
OdielOdiel	7 hm³6 October 2026	within the normal range for the date	0 hm³
OlivargasOlivargas	22 hm³6 October 2026	within the normal range for the date	0 hm³
PiedrasPiedras	26 hm³6 October 2026	within the normal range for the date	-4 hm³
SanchoSancho	48 hm³6 October 2026	within the normal range for the date	0 hm³

Rivers and lakes

Water	Places	Below normal (places)
Corumbel Bajoreservoir, Spain	1	0
Jarramareservoir, Spain	1	0
Los Machosreservoir, Spain	1	1
Odielreservoir, Spain	1	0
Olivargasreservoir, Spain	1	0
Piedrasreservoir, Spain	1	0
Sanchoreservoir, Spain	1	0