Hanhikivi 1 is a project that contributes to combatting the climate change. The climate benefit of the Hanhikivi 1 materializes during the decades of electricity production without harmful greenhouse emissions. Before commissioning, Fennovoima's direct environmental impact is mostly related to the construction work carried out at the site.

We ensure that all work on the Hanhikivi headland is carried out in accordance with environmental legislation and the permit conditions, and that the environment and the wellbeing of the local residents are respected during construction work. Our ISO 14001 certified environmental management system is an important tool in this work. 

Management of the environmental impact at the Hanhikivi 1 construction site is based on proactive identification of environmental risks. We assess environmental risks for the Hanhikivi 1 construction site as a whole from the perspectives of environmental impact, legislation, and permit conditions. At this stage of the construction project, important environmental risks include chemical and oil leaks, the spread of turbidity in the sea, and noise during blasting. We update our risk register four times a year.

All contractors working in the project area comply with a comprehensive risk assessment and risk management procedure. Furthermore, everyone working at the project site must be aware of the special characteristics of the Hanhikivi headland’s natural environment, the access limitations in the area, as well as the environmental guidelines established for the construction site. 

Project area is monitored with care 

We monitor the progress of contracted work together with RAOS Project during weekly site monitoring rounds, and we assist the contractors in better management of environmental matters. We also perform monthly targeted environmental inspections that focus on matters such as fuel storage, oil spill prevention preparedness, or dust prevention methods. The authorities also carry out regular inspections of our procedures.

Environmental impact monitoring

There are extensive protected seashore meadows, overgrowing shallow bays, and gloe lakes, which have become isolated from the sea on the Hanhikivi headland. There is a Natura 2000 conservation area approximately two kilometers from the plant area. Areas of high natural value have been left outside the plant area already at the construction planning phase.

We monitor the state of the environment together with RAOS Project in accordance with a jointly agreed environmental monitoring program. In addition to the environmental monitoring required by the permit conditions, we also carry out voluntary monitoring of the environmental impact. This allows us to ensure that we have comprehensive knowledge of the state of the environment in the Hanhikivi headland.


Air quality No increased volume of dust outside the project area. We monitor the quality of the air, especially in close proximity to nature conservation areas.
Noise Noise limit was exceeded once.
Seawater quality No changes in water samples caused by construction activities.
Turbidity Increased turbidity caused by heavy rainfall and storms were detected again during monitoring activities. The values exceeded twelve times the limit where work must be interrupted, but no construction work was in progress at the time. Breakwaters and a protective embankment built in the sea area limit the spread of turbidity from the construction area.
Fish stock The monitoring covered the fry production of whitefish, vendace, and Baltic herring. No changes that were clearly caused by water construction work could be detected in the collected fry production data.
Oil and chemical leaks Four oil spills that were considered significant took place in the project area. The term "significant spill" refers to an incident that would have caused damage to the environment had the correct preventive actions not been performed.


Seashore meadows No follow-up monitoring of seashore meadows took place in 2020. However, more specific monitoring of Siberian primrose, a plant growing in the seashore meadows, took place. It was observed that there were fewer plants at certain locations but more in others, and that the Siberian primrose had naturally spread to new areas.
Gloe lakes The security measures taken during studies on the settling pond failed, which caused the water level of the western gloe lake to rise above normal level.
Relocated species No significant changes were detected during the studies. There are still moor frogs in the project area. The transfer of yellow iris to a new habitat has been successful and the plants have already started to mix with the naturally occurring yellow irises.

Construction waste is utilized as energy or material 

Efficient sorting and recycling, as well as appropriate processing, are important parts of the management of the environmental impact of the waste generated on site. 

Most of the waste generated at the construction site is regular construction waste: metal, wood, concrete, rocks, biowaste, paper, cardboard, glass, or electrical and electronic waste. Our goals are to utilize 70% of our construction waste as materials and to utilize a total of 90% of our construction waste either as materials or in energy production.