On 13 November 2026 the BIOFOS board is due to choose where the Copenhagen area's next wastewater treatment plant, estimated at DKK 26.5–27.1 billion, will stand: a rebuilt Lynetten at Refshaleøen, or a new site at Prøvestenen. The in-principle choice opens a planning phase from 2027 to 2031, with construction set for 2032–2045. It is one of several capital decisions due in Denmark over the next twelve months.
Copenhagen's queue
HOFOR expects to decide on the Tinghøj reservoir rebuild after a criticality analysis due in Q4 2026. An earlier estimate put reservoirs and mains together at DKK 2.3 billion over ten years. HOFOR now says first estimates are significantly higher and that approval in the current form is uncertain. Its Svanemøllen cloudburst tunnel, estimated at DKK 4.1–4.6 billion, went to tender on 2 June 2026, with the contract expected in August 2027 and service from end-2033.
Aarhus waits on permits
Aarhus Vand's ReWater plant has a reported budget of DKK 6.65 billion. According to a March 2026 press report, DKK 461 million had been spent by 28 February 2026, and construction start was still two to three years away. The environmental impact assessment is under way and a related sand-extraction permit is under complaint.
Paid for by tariffs
The money comes from customers and the municipal lender. In 2022 regulated companies invested DKK 9.96 billion, DKK 7.80 billion of it in wastewater, and the sector owed DKK 40.1 billion, mainly to KommuneKredit. Coastal protection runs on a separate state track. A DKK 912.1 million package for 2026–2029 is agreed, while the government's DKK 14.9 billion plan for 2029–2040 had no cross-party agreement as of 3 November 2026.
Which of these projects are in procurement, which face permit or cost risk, how revenue caps limit renewal and which dates matter to bidders are covered in the full report. The full report, Water Infrastructure Investment and Project Pipeline in Denmark, is available for USD 249. For a free overview, see Denmark Country Snapshot.