The numbers, released by the Portuguese Environment Agency, indicate that there was a decrease, compared to the end of August, in all monitored basins (60).

As for those with less water, one is in the Lima basin, another in the Mondego basin, two in the Algarve and five in the Sado basin. In Sado, the Campilhas dam is at 04%, the Monte da Rocha dam at 18%, with the Odivelas dam at 39% being the fullest.

The Mira and Ribeiras do Barlavento basins “continue with total storage values ​​lower than the historical average values”, the bulletin says, in which it is also noted that the storages in September 2021 are higher than the September averages (taking into account 1990/91 to 2019/20), except for the Mira and Barlavento reservoirs and also Lima and Guadiana.

The Barlavento basins, which are in the worst situation, for an estimated average in September of 56.8, are with 16.6%.

The APA also notes that the reservoirs in the Eastern Algarve are below average, and that the most worrying case in the western Algarve is the Bravura dam, with water levels “below historical values” (17%).

The APA also notes that the Santa Clara dam, which supplies the irrigation perimeter of the southwest of Alentejo and the controversial greenhouses, "is 44% below the minimum level."