Porto's municipal water tariff rose 2.8% in 2026, made up of 1.8% forecast inflation and 1% for investment, after a 3.1% update in 2025. In 2025, complaints to Águas e Energia do Porto rose 36.8% to 1,789.
A steep block structure
The 2026 domestic tariff charges €0.4945/m³ for the first 5 m³ every 30 days, €0.9649/m³ up to 15 m³, €1.7657/m³ up to 25 m³ and €3.0016/m³ above that, about six times the first block. Non-domestic users pay a single rate of €1.9248/m³. ERSAR's economic accessibility indicator for water was 0.19% in 2024.
What customers complain about
Meter reading, billing and collection accounted for 54% of the 1,789 complaints in 2025. The company reported an average final response time of 4.5 days to written complaints. It served 170,276 clients at the end of 2025.
The cost behind the tariff
The company buys all its drinking water in bulk from Águas do Douro e Paiva, whose 2026 tariff is €0.3944/m³ plus a CTA component of €0.0856/m³. Its own turnover reached €59.4 million in 2025, up 3.82% on 2024, and it ended the year with zero bank borrowings.
What Porto's networks, wastewater plants and finances look like, which projects run to 2027 and who governs the company are set out in the full profile. The full report, Utility Intelligence Profile: Águas do Porto, is available for USD 99. For a free overview, read the Águas do Porto Utility Snapshot.