In July 2026 Águas e Energia do Porto launched a joint tender for 100% renewable electricity on behalf of the Municipality of Porto and its municipal companies, with an estimated value of €20.7 million. The notice, 081CPI26, appeared in the EU Official Journal on 20 July 2026, and bids closed on 19 August 2026.
Four lots, 28 months
The tender covers four lots of 28 months each, including supply to the Sobreiras and Freixo wastewater treatment plants. The company's current supply contract, with Iberdrola Clientes Portugal for €2,968,709.87, was signed on 11 December 2024. No award for 081CPI26 had appeared on the BASE public contracts portal by 7 November 2026.
Energy at the treatment plants
The plants are the focus of a €4.5 million energy programme. Sobreiras received a 387 kWp solar plant in 2025, and Freixo's solar capacity is due to rise from 133 kWp to 635 kWp by the end of 2026; Energy Drawing S won the Freixo solar contract for €319,436.57 in March 2026. NBS Water Engineering supplied aeration compressors for €553,338.31 in July 2026.
Sludge and chemicals
Other operating contracts are also sizeable. PreZero Portugal and Terra Fértil hold sludge removal from both plants for €3,375,000, signed on 2 December 2025, and RNM Produtos Químicos supplies sludge polymer for €1,166,200.
Where Águas do Porto's capital programme is heading, how it buys works and services and which projects suppliers should watch through 2027 are covered in the full brief. The full report, Águas do Porto: Utility Account Brief, is available for USD 499. For a free overview, read the Águas do Porto Utility Snapshot.