Tallinna Vesi, which plans €60 million of investment in 2026, ran EU-wide competitions for three large contracts in 2026. Each was tendered as a single contract, and together they show how the Tallinn water company buys.
Three procedures, one rulebook
All three notices were published on TED under the EU utilities directive, Directive 2014/25/EU, with documents and submissions on the Estonian state procurement register. The collector works on Sõle Street, Kolde Avenue and Auna Street were tendered by open procedure, with work planned to run to 29 October 2027. The reconstruction of ozonation at the Ülemiste Water Treatment Plant uses a competitive procedure with negotiation: requests to participate closed on 15 May 2026, and no award had been published by 10 November 2026. Maintenance of the biogas combined heat and power plant at Paljassaare went to open tender, with bids due on 2 September 2026.
Long contracts, whole packages
The ozonation contract runs for 48 months and bundles design, equipment, installation and commissioning. The maintenance contract runs for 72 months and requires spare parts for the life of the equipment. None of the three was split into lots, because the company treats each as one economic whole.
What comes next
The company says its investment focus is shifting from wastewater treatment to modernising water treatment, including microfiltration, which is not part of the ozonation notice. Its 2026 programme also includes 40 km of pipeline construction and renovation, at least 25% of it trenchless, after 45.1 km in 2025, 49% of it no-dig; 12 km were built and renovated in the third quarter of 2026.
Who already holds Tallinna Vesi's major contracts, which projects are open, emerging or strategic, and where suppliers should focus first are set out in the brief. The full report, Tallinna Vesi: Utility Account Brief, is available for USD 499. For a free overview, read the Tallinna Vesi Utility Snapshot.