7 reservoirs with a combined capacity of 677 hm³ · latest official reading: 6 October 2026
The Catalan inland basins is currently at 73.0 % of capacity, above normal for the time of year. The week-41 average across 38 years of records is 57.0 %, a difference of +16.0 points.
For context: a year ago it stood at 74.6 % and a month ago at 76.4 %. Against last week’s reading it is falling (−0.6 points).
Blue line: average monthly filling for the whole demarcation since 1988. The dot marks today’s reading, 73.0 % in October.
With 2,023 weeks of record since 1988, the average pattern of the Catalan inland basins is clear: it peaks in June at 72.4 % and bottoms out in October at 56.9 %. That 16-point range makes it a moderately seasonal demarcation.
The highest reading in the whole series is 97.6 %, on 28 April 2020, and the lowest 14.5 %, on 5 March 2024. Comparing today against those two extremes says more than the bare percentage: 50 % is comfortable in a demarcation that rarely tops 60 %, and worrying in one that usually reaches summer full.
By capacity it is the 12th demarcation of the 14 covered by the hydrological bulletin: its 677 hm³ account for 1.2 % of everything Spain can store in mainland reservoirs. Today it holds 494 hm³.
The 7 dams the hydrological bulletin tracks in the Catalan inland basins, sorted by capacity. Linked names have their own page with the full record.
| Reservoir | Capacity (hm³) | Volume (hm³) | Fill | Δ week | Use |
|---|---|---|---|---|---|
| Susqueda | 233 | 184 | 79.0 % | +0.0 | Irrigation / supply |
| Sau | 165 | 113 | 68.5 % | −1.8 | Irrigation / supply |
| La Baells | 109 | 77 | 70.6 % | −0.9 | Irrigation / supply |
| La Llosa del Cavall | 80 | 60 | 75.0 % | −1.2 | Irrigation / supply |
| Boadella | 61 | 38 | 62.3 % | +0.0 | Irrigation / supply |
| Sant Pons | 24 | 20 | 83.3 % | +4.2 | Irrigation / supply |
| Riudecanyes | 5 | 2 | 40.0 % | +0.0 | Irrigation / supply |
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The figures on this page come from the official MITECO reservoir archive, the same database behind Spain’s weekly hydrological bulletin. The bulletin covers every mainland reservoir above 5 hm³ of capacity and is published every Tuesday with Monday’s reading.
The latest reading here is from 6 October 2026, and the comparison series starts in 1988. Nothing is estimated, interpolated or forecast: the percentage is stored volume divided by the usable capacity the bulletin itself assigns to the dam. Historical averages are computed over the same calendar week in every previous year, the only fair comparison in a system with such marked seasonality.
National summary and reservoir search on Reservoirs of Spain.
