Environmental impact assessment is an important part of every geothermal project. Environmental factors have to be considered from the earliest plans right through to the point where a power plant is built.

The main environmental factors in geothermal utilisation are:
- Surface changes
- Ground deformation from fluid withdrawal
- Noise
- Thermal pollution
- Chemical pollution
- Conservation
ÍSOR's environmental services
- Recording of environmental change, including in connection with geothermal utilisation
- Gravity and elevation measurements ahead of utilisation
- Groundwater research
- Reinjection studies
- Recording of gas flux
