This data is sourced from the Electricity Authority and is not collected by Ministry of Business, Innovation and Employment directly. http://www.emi.ea.govt.nz/
Regions are those defined by the Electricity Authority and are not those defined by Regional Council boundaries. For ease of understanding 'North Isthmus' as defined by the EA has been renamed 'North Auckland and Northland' and 'Auckland' has been renamed 'Central and South Auckland'. 'South Canterbury' has been added to 'Canterbury'.
Demand by the New Zealand Aluminium Smelter at Tiwai Point is excluded from Otago/Southland and stated separately.