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Objective met in 2017 (in regard to the objective for 2021)


At the Sant Joan Despí drinking water treatment plant, situated in a suburban zone of the Barcelona metropolitan area and next to the Llobregat River, Aigües de Barcelona has developed a plan focused on four types of actions:

  • Conservation (areas that must be conserved)
  • Restoration (degraded areas that must be recovered)
  • Recovery and conservation of species
  • Interpretation (areas dedicated to environmental education)

With this plan of action, the required habitat has been created for pollinizers, bats, nocturnal birds of prey and other birds, North African hedgehogs, amphibians, and a greater diversity of invertebrates. Urban biodiversity is promoted and connectivity is increased in a zone in which there are strong environmental pressures, but which contains spaces of great natural interest.

In this DWTP, a Mediterranean butterfly reserve has also been created. This consists of 2,312 plantlets of 42 species, selected to cover all phases in the life cycle of butterflies. The garden has been made according to environmental criteria, and all the plants are of Mediterranean origin.


"The protection of biodiversity is fundamental to the sustainable management of water. This is reflected in the REwater Global Plan."
Clara Rovira, Head of Biodiversity                                                                                                                                                                                                     


Further information

Learn more about the Sant Joan Despí DWTP, Barcelona
For more examples and best practices developed at SUEZ in Spain in the area of biodiversity, see our Sustainable Development Report.