Energinet.dk observes the precautionary approach introduced by the Danish health authorities when constructing new electricity supply installations. Furthermore, we rely on evaluations made by internationally recognised bodies such as the World Health Organisation (WHO), which in 2007 in connection with the completion of its comprehensive magnetic field project defined a precautionary approach on the basis of its recommendations.

Back in 1993, the Danish National Board of Health adopted a precautionary approach for high-voltage lines. The basis for this was evaluations of research into magnetic fields and health risks prepared by SEIIS, the task force set up by the Danish Ministry of Health. The evaluation was described in the press release issued by the Danish National Board of Health in 1993. In 2007, following a review of the 2007 WHO evaluation, the Danish National Board of Health concluded that there was no reason to change the previous evaluations and the precautionary approach from 1993.

Exposure limits, no - precautionary approach, yes
In 1993, the Danish National Board of Health came to the conclusion that there was no scientific reason for changing existing power lines. Nor were they of the opinion that there was a scientific reason for defining exposure limits for magnetic field strengths or minimum distances between power lines and homes. Instead, the Board recommended a precautionary approach for the construction of new alternating-current power lines. As such, new power lines should not be built close to residential areas or day-care institutions.

The Danish National Board of Health does not prescribe a specific distance between power line and residence. Instead, the distance required should be determined on the basis of a specific assessment of the individual project and the fields to which the inhabitants will be exposed.

The precautionary approach also applies to the parcelling out of land
The precautionary approach is not only directed at power utilities but also at authorities parcelling out land and building houses in areas with power lines. This was made clear in a letter to municipalities and countries in 1993 and repeated in the Danish National Board of Health's recommendation from 2007.

Since the introduction of the precautionary approach, the Danish health authorities have not deemed it necessary to change it. In 2007, WHO decided that actual exposure limits are not required. Instead, it recommends a precautionary approach.