The Amstel, Gooi en Vecht water authority, which treats Amsterdam's wastewater and maintains its regional dikes, plans to invest EUR 160.8 million in 2026. Its own 2026 budget puts recent delivery at about EUR 70 million a year, so the plan is about 2.3 times what it has been building.
The plan holds after 2026
The authority's investment programme averages about EUR 158.2 million a year from 2027 to 2030 across its 20-municipality area. Wastewater treatment rises from EUR 62.1 million in 2026 to EUR 91.2 million in 2027. Over 2026 to 2030, planned wastewater investment adds up to EUR 388.0 million.
RWZI Amsterdam-West is the centre of gravity
The plant that serves much of the city needs a new sludge dewatering installation, with construction planned for 2027 to 2029. Its effluent pipelines are being repaired through 2027, and a study of how to expand its water line was completed in 2025. The nearby Westpoort plant is already at full load.
Delays are already visible
The budget itself calls the investment rise ambitious. It reports that micropollutant treatment at Uithoorn and De Ronde Venen, backed by a EUR 52.5 million credit from 2024, slipped to construction in 2027 to 2028 because of capacity shortages. A new plant at Huizen is now planned to start operating in 2032.
Borrowing will rise
The authority kept its 2026 tariffs flat, and its net debt ratio is projected to climb from 248% in 2026 to 303% in 2030, below a ceiling of 400%. On the drinking water side, Waternet has two measures planned before 2030 that would add 10 million cubic metres a year, with a further 6 million at Weesperkarspel now expected in 2031.
Which projects are funded and at what stage, how each client finances its programme, where post-2030 drinking water capacity will come from and what contractors should watch are set out in the report. The full report, Water Infrastructure Investment and Project Pipeline in Amsterdam, is available for USD 249.