Sustainability indexes

Our presence in these indexes highlights the hard work in the area of corporate responsibility and information transparency and demonstrates external recognition of the excellent evolution of our actions in these areas.

Year included: 2001

Leading position among the most sustainable companies in the utilities sector renewed

Carbon Disclosure Project (CDP)
Year included: 2009

Globally recognised for our management against climate change and the twelfth time in which the score places us among the group of world leaders for our action in favor of the climate. In addition, we have been recognized with a level of “Direction” for the management of water resources

Euronext Vigeo World/ Europe/ Eurozone 120

We continue to form part of the Euronext Vigeo, Europe 120 and Eurozone 120 indexes, based on the agency’s biannual assessment

Sustainalytics ESG Rating
Year included: 2017

We maintain a low risk profile when compared with the 712 utilities assessed and we have been recognised as an ESG Industry Top-Rated company

MSCI ESG Rating/ Leaders Index, MSCI Global Climate
Year included: 2014

We were assessed by this ratings agency in 2022 and once again achieved the maximum score (AAA)

ISS ESG Rating
Year included: 2014

We remain among the 10% of companies in the industry with the highest ratings


Awarded a platinum medal for our performance in terms of social, environmental and good governance issues by this global provider of business sustainability ratings

S&P Global
Year included: 2004

Miembros del Sustainability Yearbook 2023