About Hydro Company history 2018 - present 2018: Extreme rainfall in Brazil 2018: Extreme rainfall in Brazil In February 2018, the region of Barcarena in northern Brazil suffered from flooding following two days of heavy rainfall, leading to community concerns and production embargoes by Brazilian authorities on our operations. The areas flooded included Hydro’s Alunorte alumina refinery, which refines bauxite into alumina which is then used to produce aluminium. Following the rainfall, communities around the alumina refinery were concerned that flooding could have resulted in overflows or leaks from Alunorte’s bauxite residue deposits into surrounding areas. Brazilian authorities instituted various embargoes over the several months to come, which affected both the Alunorte alumina refinery and our bauxite mine in Paragominas, which supplies bauxite to Alunorte via a 244-kilometer-long pipeline. Several investigations and inspections were conducted that confirm there were no leaks or overflow from Alunorte’s bauxite residue deposits. Through dialogue with all relevant authorities at the local, regional and national level in Brazil, the last embargoes on Alunorte were lifted on September 26, 2019. Updated: June 11, 2021 Hydro history in brief Let us show you the highlights of our history, in a compelling visual scrollstory. 2021: Sale of rolling business 2020: New strategy toward 2025 2019: New CEO 2019: Cyber-attack on Hydro 2018: Extreme rainfall in Brazil About Hydro Key facts Hydro worldwide The Hydro Way Brand center Corporate governance Modern Slavery Transparency statement Website cookies Contact Contact Media contacts Investor Relations Contacts Customer service portal Follow us Instagram Facebook LinkedIn Twitter Flickr YouTube Shapes Suppliers Privacy policy Terms & conditions Accessibility Sitemap © 2021 Norsk Hydro ASA

About Hydro Publications Annual reports Annual reports Hydro Annual report 2020 Download (pdf, 11.60 MB) Hydro Annual report 2019 Download (pdf, 14.94 MB) Hydro Annual report 2018 Download (pdf, 5.71 MB) Hydro Annual report 2017 Download (pdf, 3.75 MB) Hydro Annual report 2016 Download (pdf, 3.26 MB) About Hydro Key facts Hydro worldwide The Hydro Way Brand center Corporate governance Modern Slavery Transparency statement Website cookies Contact Contact Media contacts Investor Relations Contacts Customer service portal Follow us Instagram Facebook LinkedIn Twitter Flickr YouTube Shapes Suppliers Privacy policy Terms & conditions Accessibility Sitemap © 2021 Norsk Hydro ASA