Water is an essential resource for human life, for the balance of ecosystems, for food production, for energy generation and for the economy as a whole. Environmental and economic pressures placed on this limited natural resource, as well as its intrinsic relationship with other priorities, such as energy production, adaptation to climate change and food crops, contribute to making the management of water and its services a priority topic in the international agenda.

Therefore, all legislation developed for this sector, whether European or domestic, aims at protecting inland surface waters, transitional waters, coastal waters and groundwater, in order to:

  • prevent degradation, protect and improve the state of ecosystems;
  • promote sustainable water consumption;
  • strengthen and improve the aquatic environment by reducing or eliminating discharges, emissions and losses of priority substances;
  • avoid the further pollution of groundwater and ensure its gradual reduction;
  • contribute to mitigating the effects of floods and droughts;
  • ensure a sufficient quantity of good-quality surface and groundwater, aiming at a sustainable, balanced and equitable use of water;
  • protect marine waters and promote the prevention and elimination of marine pollution.

In order to ensure the proper implementation of the legislation enacted to achieve these goals, it is essential to monitor the state of water bodies, their availability, the use of water resources and other pressures that are exerted on water, the occurrence of floods and periods of drought and the quality of water intended for human consumption.

Fact sheets

  • State of Surface and Groundwater Bodies
    The "State of Surface and Groundwater Bodies" fact sheet analyses the ecological and chemical status of surface water and the quantitative and chemical status of groundwater.
  • Surface and Groundwater Availability

    The "Surface and Groundwater Availability" fact sheet analyses water availability in mainland Portugal in a given year, making it possible to assess whether the year was wet, average or dry.