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Hamburg Wasser runs a groundwater-only supply with averaged losses of 3.8% and a treatment plant that met its discharge permit in 2025. Its main exposures lie elsewhere: a Nordheide water right serving around 300,000 residents that has been under appeal since December 2021, cloudbursts in a city that is 40% sealed, and sludge and phosphorus rules from 2029 that are pulling investment toward the treatment plant.

Hamburg Wasser plans about €1.15 billion of investment for 2025–2029, and its largest projects sit at the central treatment plant: new digesters now in procurement, VERA II budgeted at €315.1 million and phosphorus recovery moving to regular operation in 2027. It buys through its own e-tendering portal and EU notices, with different procurement rules for its water and wastewater companies.

Hamburg Wasser is two city-owned companies under one management, serving about 2.3 million people from groundwater with water losses between 3.6% and 4.0% for a decade. Group revenue reached €701.6 million in FY 2025, about €1.15 billion of investment is planned for 2025–2029, and the VERA II sludge incinerator was budgeted at €315.1 million in September 2026 with no revised commissioning date given, after a July 2025 plan for stepwise commissioning from 2027.

This report evaluates how Hamburg Wasser manages integrated public utility governance, green finance, infrastructure renewal, energy recovery, climate adaptation, digital operations, and circular resource management.