A contractor suffered burns to his face and arms in an explosion at a water treatment plant north of Upper Hutt today.
A Fire service spokesman said the explosion, at Te Marua water treatment plant, happened at 3.30pm.
Greater Wellington Regional Council's communication manager said the blast happened while two electrical contractors were working on a switchboard.
The other contractor escaped injury but the burnt man was taken to hospital.
Mr Sangster said there was a small fire but that was brought under control.