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MainPower is the electricity distribution network for North Canterbury. Based in Rangiora, we are responsible for delivering electricity to over 44,000 homes and businesses in the Waimakariri, Hurunui, and Kaikōura districts.

Outage notifications

Maintenance - Swannanoa Substation

Due to maintenance of Swannanoa Substation streetlights will remain switched on in the greater Swannaona area from Sunday 21/09/25 trough to Saturday morning 11/10/25

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Treat all lines as live during the outage period; power may be restored at any time. If you require further information, please call MainPower’s 24-hour faults line. To report an emergency, call 111.

Outage notifications

Maintenance - Swannanoa Substation

Due to maintenance of Swannanoa Substation streetlights will remain switched on in the greater Swannaona area from Sunday 21/09/25 trough to Saturday morning 11/10/25

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Recent news

MainPower announces new Chief Executive

Trimming Season: Shelterbelts and power lines don’t mix

Smarts Road & Ashley River Crossing

Outage notifications

Is your outage not listed?

Outage notifications

Is your outage not listed?