On the last day of June, compared to the previous month, there was an increase in the volume stored in two drainage basin and a decrease in 10.

The Barlavento (28.7 percent), Mira (48 percent) and Lima (57.9 percent) basins had lower water availability at the end of June.

According to SNIRH data, the Mondego (89.7 percent), Ave (82.9 percent), Guadiana and Tejo (82.6 percent), Douro (79.9 percent), Cávado (79.3 percent) basins, Oeste (76.8 percent), Arade (69.4 percent) and Sado (62.9 percent) had the highest levels of storage at the end of June.

Each drainage basin can correspond to more than one reservoir.