RNZ analysis: The real-world cost of AI concentrates in energy and water use

An RNZ analysis reports that hyperscaler data centres installed in New Zealand over the past two years now consume 1.2 terawatt-hours of electricity per year and 3.8 billion litres of water for cooling. Those figures equate to about 4 percent of all consumer electricity use in the Auckland region and 2.1 percent of the city's annual drinking water consumption.

The Electricity Authority, the energy regulator, has announced it will publish annual carbon-intensity and water-recovery thresholds for hyperscaler data centres in September. The Ministry for the Environment says permits for three new data centres in Auckland's Manukau and Wellington's Petone districts are being reviewed. The ministry has flagged a clash between hydropower storage priorities and data-centre load demand.

Hyperscaler operators are negotiating to strengthen commitments on closed-loop cooling systems and waste-heat recovery. Industry representatives say New Zealand wants to preserve its regional competitiveness for cloud infrastructure, while environmental groups are demanding stricter thresholds on sustainability grounds. These are general industry assessments.