Summary
- Police have received five investigation requests relating to the Muhos site.
- The developer has been ordered to provide more detailed drainage information.
- The criminal inquiry is preliminary and investigators hope to finish during 2027.
Finnish police have opened a preliminary criminal investigation into suspected environmental damage at Google’s proposed data centre site in Muhos, examining preparatory works after earlier restrictions imposed by environmental authorities.
The Oulu Police Department confirmed the inquiry on 29 October following a request from the Finnish Supervisory Agency. Police have received five investigation requests concerning Muhos, all of which will be considered in the preliminary investigation.
Investigators are examining reported irregularities in drainage and water management. Police have characterised the matter as suspected environmental damage and said other possible offences may become apparent during the inquiry. Neither the opening of an investigation nor the suspicion establishes criminal responsibility.
Google’s Finnish subsidiary Tuike Finland is developing the site. On 14 October the company confirmed that preparatory works had been suspended at both Muhos and Kajaani-Otanmäki after the regulator required work to stop while environmental impact assessments remained incomplete. The new police inquiry specifically concerns the Muhos development.
The distinction between the two stages is important. Environmental supervision can restrict activities and require further evidence without establishing an offence; the police investigation separately examines whether events already undertaken warrant criminal proceedings.
Drainage plans face a deadline
The Supervisory Agency has required a more detailed water management plan for Muhos by 5 November. It has asked for information on drainage structures, implementation schedules and independent monitoring, including how proposed controls would perform during heavy rainfall and snowmelt.
The authority has also highlighted possible risks associated with acidic black shale soils. Disturbing such materials can introduce additional considerations for water management, depending on site conditions and the pathways by which runoff may reach surrounding land and watercourses.
Preparing a large industrial site can change how surface water moves before permanent buildings are constructed. Clearing vegetation, excavating and installing drainage channels may alter runoff and sediment transport. Those effects require assessment against the specific geology and hydrology of the location.
The regulator has said existing plans did not sufficiently establish that water-related environmental effects were adequately controlled. Its request for further information is a concrete compliance obligation separate from the investigation’s determination of past events.
If the developer fails to provide adequate corrective measures, the authority may consider enforcement action supported by a conditional fine. The existence of that possibility does not mean the fine has been imposed or that any particular sanction will follow.
Investment programme remains subject to approvals
The Muhos site forms part of Google’s wider programme of proposed data centre investment in Finland. The company has described a €13 billion programme, but such investment commitments do not replace the environmental requirements attached to individual projects.
Electricity infrastructure, site works, water management and land-use decisions progress through separate processes. A large development can have an investment plan and potential power requirements while still needing essential environmental assessments before construction can proceed.
At Muhos, the confirmed position includes a suspension of preparatory work, additional water management information requested by the regulator and an unresolved criminal investigation. No verified completion or restart date follows from those facts.
Police expect the preliminary investigation to take considerable time and aim to conclude it during 2027. An update may be provided in December 2026, while the developer faces the earlier 5 November deadline for its water management submission.
Google has indicated that it is cooperating with the authorities. The next substantive findings will arise from the regulator’s consideration of the revised drainage information and the police investigation, rather than assumptions about the future construction programme.
