Electric and magnetic fields

All electricity produces electric and magnetic fields (EMF) and our transmission lines are no different. Some people have concerns surrounding the perceived health effects of EMF exposure, and numerous studies have been undertaken internationally on the subject.

If you have concerns over EMF levels from one of our lines over your land, you may find the factsheets below useful. Alternatively, you can contact us directly.

Safety commitment

Transpower is the owner and operator of the National Grid – the high voltage transmission network made up of lines and substations connecting areas of electricity generation with towns and cities across New Zealand.

  • We put safety first.
  • We take responsibility for our personal safety and the safety of others.


To ensure the safety of our staff, our Service Providers and the general public.

Our Belief

We are committed to Zero Harm to all workers and public in Transpower’s workplaces and asset locations.