Kajaani

Kajaani leads the global data-centre siting shortlist for 2026, according to briefing analysis combining grid, water, and consent metrics. Fingrid, Finland's National Grid operator, offers fast connections without a queue comparable to NESO (UK) or ERCOT (Texas); WRI Aqueduct rates Finnish baseline water stress at under 0.10 — effectively negligible; and the arctic climate provides more than 8,000 free-cooling hours per year, dramatically reducing the energy needed for cooling relative to equatorial or desert sites.

Kajaani is a city of approximately 35,000 people in the North Ostrobothnia and Kainuu region of central-northern Finland. It hosts a significant data-centre presence including a Microsoft Azure campus that has operated since 2011, one of the company's oldest and largest European DC sites. The city's former pulp and paper industry base Left brownfield industrial land with existing heavy-power infrastructure — a combination that makes greenfield DC development faster and cheaper than in land-constrained coastal markets.

The binding constraints for Kajaani are not consent or supply but rural transmission capacity (the existing 400 kV backbone does not pass directly through the city) and a small operations-talent pool. Operators running GPU clusters at hyperscale typically need highly specialised electrical and cooling engineering staff; attracting and retaining that talent in a small city 550 km north of Helsinki is a genuine operational challenge.