Reservoirs in the Cantábrico Occidental basin

On 6 October 2026 the 9 reservoirs of the Cantábrico Occidental basin held 276 hm³ of water, 56.9 percent of their capacity of 485 hm³. That is 1.7 percentage points less than a week earlier. A year earlier, on 7 October 2025, they held 61.8 percent. That share is within the normal range for the date. We follow 9 reservoirs in the Cantábrico Occidental basin. Of the 8 reservoirs with a current reading and a normal range for the date, none read below that range and none above it. Data: 6 October 2026.

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

Level
Below the normal range
Above the normal range
Normal range for the date
Median for the date
A year earlier

Share of capacity full of the reservoirs of the Cantábrico Occidental 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	61.8 percent	50.1 percent to 73.8 percent	61.8 percent	71.8 percent
13 October 2025	60.6 percent	50.1 percent to 72.5 percent	60.6 percent	76.9 percent
20 October 2025	58.2 percent	49.5 percent to 71.7 percent	60.0 percent	75.9 percent
27 October 2025	58.0 percent	49.7 percent to 72.6 percent	60.5 percent	74.9 percent
3 November 2025	55.5 percent	50.2 percent to 71.4 percent	60.7 percent	70.4 percent
10 November 2025	55.5 percent	51.2 percent to 70.4 percent	62.2 percent	58.8 percent
17 November 2025	57.1 percent	52.9 percent to 78.3 percent	63.5 percent	57.6 percent
24 November 2025	57.6 percent	53.6 percent to 79.9 percent	64.3 percent	59.8 percent
1 December 2025	60.8 percent	53.3 percent to 81.0 percent	65.7 percent	65.7 percent
8 December 2025	68.6 percent	53.4 percent to 83.4 percent	66.2 percent	62.9 percent
15 December 2025	61.8 percent	54.3 percent to 84.8 percent	68.5 percent	60.8 percent
22 December 2025	54.3 percent	55.1 percent to 84.3 percent	68.3 percent	64.1 percent
29 December 2025	56.9 percent	56.0 percent to 85.6 percent	69.8 percent	65.5 percent
5 January 2026	55.1 percent	57.3 percent to 85.6 percent	74.5 percent	64.3 percent
12 January 2026	59.8 percent	57.1 percent to 87.5 percent	74.9 percent	71.8 percent
19 January 2026	56.1 percent	58.2 percent to 87.7 percent	74.2 percent	68.2 percent
26 January 2026	60.0 percent	60.0 percent to 87.3 percent	74.8 percent	60.6 percent
2 February 2026	82.0 percent	61.6 percent to 87.9 percent	77.6 percent	80.4 percent
9 February 2026	89.6 percent	62.1 percent to 88.0 percent	78.7 percent	80.4 percent
16 February 2026	90.8 percent	62.0 percent to 88.4 percent	79.2 percent	78.4 percent
23 February 2026	92.0 percent	62.2 percent to 88.4 percent	78.9 percent	79.4 percent
2 March 2026	86.1 percent	60.5 percent to 88.8 percent	78.7 percent	75.9 percent
9 March 2026	86.9 percent	60.8 percent to 89.6 percent	78.2 percent	75.3 percent
16 March 2026	86.3 percent	63.4 percent to 88.7 percent	79.3 percent	72.2 percent
23 March 2026	84.1 percent	64.3 percent to 86.4 percent	78.8 percent	72.7 percent
30 March 2026	85.7 percent	65.1 percent to 87.8 percent	79.2 percent	79.6 percent
6 April 2026	86.7 percent	70.5 percent to 88.3 percent	79.6 percent	80.6 percent
13 April 2026	85.1 percent	73.6 percent to 88.4 percent	80.0 percent	79.2 percent
20 April 2026	84.9 percent	75.6 percent to 89.5 percent	82.7 percent	83.5 percent
27 April 2026	81.8 percent	76.8 percent to 90.0 percent	84.7 percent	87.1 percent
4 May 2026	82.5 percent	77.3 percent to 90.5 percent	85.9 percent	86.9 percent
11 May 2026	83.9 percent	77.9 percent to 91.7 percent	86.6 percent	88.8 percent
18 May 2026	85.5 percent	78.0 percent to 92.6 percent	87.4 percent	92.2 percent
25 May 2026	87.4 percent	77.8 percent to 93.2 percent	87.4 percent	93.3 percent
1 June 2026	88.0 percent	74.9 percent to 93.5 percent	87.8 percent	92.0 percent
8 June 2026	87.8 percent	74.9 percent to 93.1 percent	87.7 percent	90.6 percent
15 June 2026	87.1 percent	74.1 percent to 92.9 percent	87.5 percent	87.8 percent
22 June 2026	85.9 percent	74.0 percent to 92.8 percent	86.8 percent	86.1 percent
29 June 2026	83.7 percent	73.0 percent to 92.5 percent	85.5 percent	84.5 percent
6 July 2026	82.2 percent	71.9 percent to 91.3 percent	84.2 percent	81.6 percent
13 July 2026	79.8 percent	71.0 percent to 90.4 percent	82.5 percent	79.4 percent
20 July 2026	75.5 percent	69.0 percent to 89.7 percent	80.7 percent	76.3 percent
27 July 2026	74.1 percent	67.0 percent to 88.5 percent	79.3 percent	73.9 percent
3 August 2026	72.5 percent	64.0 percent to 87.1 percent	77.8 percent	72.7 percent
10 August 2026	70.8 percent	62.5 percent to 85.7 percent	76.9 percent	70.6 percent
17 August 2026	69.4 percent	60.9 percent to 83.9 percent	75.0 percent	69.0 percent
24 August 2026	67.1 percent	59.7 percent to 83.0 percent	74.0 percent	67.4 percent
31 August 2026	66.1 percent	58.4 percent to 81.9 percent	70.9 percent	66.7 percent
7 September 2026	64.3 percent	57.4 percent to 79.6 percent	70.1 percent	65.3 percent
14 September 2026	62.2 percent	56.0 percent to 78.5 percent	67.9 percent	64.7 percent
21 September 2026	61.2 percent	54.7 percent to 76.7 percent	65.6 percent	63.7 percent
28 September 2026	58.6 percent	54.0 percent to 75.1 percent	64.7 percent	62.9 percent
5 October 2026	56.9 percent	51.0 percent to 74.0 percent	62.9 percent	61.8 percent

0 places below normal and 0 places above

Places in Cantábrico Occidental basin

Place	Reading	Against normal for the date	Change in a week
AlfiloriosAlfilorios	3 hm³6 October 2026	within the normal range for the date	0 hm³
Alsa - MediajoAlsa - Mediajo	18 hm³6 October 2026	within the normal range for the date	-1 hm³
ArbónArbón	37 hm³6 October 2026	within the normal range for the date	0 hm³
DoirasDoiras	71 hm³6 October 2026	within the normal range for the date	-1 hm³
La BarcaLa Barca	23 hm³6 October 2026	within the normal range for the date	-1 hm³
La CohillaLa Cohilla	2 hm³6 October 2026	within the normal range for the date	0 hm³
RiosecoRioseco	3 hm³6 October 2026		0 hm³
SalimeSalime	99 hm³6 October 2026	within the normal range for the date	-6 hm³
TanesTanes	20 hm³6 October 2026	within the normal range for the date	-2 hm³

Rivers and lakes

Water	Places	Below normal (places)	Above normal (places)
Alfiloriosreservoir, Spain	1	0	0
Alsa - Mediajoreservoir, Spain	1	0	0
Arbónreservoir, Spain	1	0	0
Doirasreservoir, Spain	1	0	0
La Barcareservoir, Spain	1	0	0
La Cohillareservoir, Spain	1	0	0
Riosecoreservoir, Spain: 3 hm³	1	0	0
Salimereservoir, Spain	1	0	0
Tanesreservoir, Spain	1	0	0