Australia's AI data centre boom raises questions over energy, water and community impact

Lucy puts her child to bed to the sound of a constant hum. It's not traffic or construction—it's a data centre sitting just 350 metres from her front door in Lane Cove, a suburb on Sydney's lower north shore. Four more are planned for the industrial park nearby. The noise, she says, makes her pause and wonder what's happening. For her and thousands of other Australians, the answer is that their country has become one of the world's most attractive destinations for artificial intelligence infrastructure, and the machinery of that transformation is now their neighbour.

Australia has moved fast. There are 162 data centres operating across the country today, with another 90 in the pipeline. Investors have committed more than A$155 billion to the sector, drawn by the country's renewable energy capacity, natural gas reserves, and available land. Earlier this year, OpenAI's CEO Sam Altman suggested Australia could become a data centre capital of the world. One facility planned for western Sydney will consume a full gigawatt of power—enough to make it Australia's single largest energy user. Another, already under construction in Marsden Park, is the Southern Hemisphere's biggest, built just 100 metres from a residential community.

The appeal is straightforward. Data centres have been essential infrastructure since the internet arrived, but the explosion of AI after ChatGPT's 2022 launch created an urgent race to build more. Australia's position matters: the country has 13.6 million monthly AI users, making it the sixth most active globally. Having local data centres reduces latency—the delay in data travel—which matters for everything from air traffic control to robotic surgery. Belinda Dennett, CEO of Data Centres Australia, frames the choice starkly: without building this infrastructure, Australia becomes merely a consumer of foreign tools, importing value rather than creating it. The country also offers political stability, Five Eyes security alliance membership, a skilled workforce, and a reliable energy grid. Business leaders and economists argue the data centre boom has been crucial to Australia's economic health, potentially preventing recession.

But the costs are becoming visible. The Australian Energy Market Operator projects data centre energy demand could triple by 2030. Without significant new renewable generation and storage capacity, the Climate Council warns that data centres could push power prices up 26 percent in New South Wales by 2035. The problem is fundamental: data centres need uninterrupted power at scales and speeds that wind and solar alone cannot provide. This has already pushed some operators toward gas and coal. Cloud Carrier, an Australian-owned group, is building three gas-fired power stations to fuel its existing data centre and two more planned facilities, all within 90 minutes of Sydney. If the grid falters, facilities like the one near Lucy's home will fire up diesel backup generators. NSW Treasurer Daniel Mookhey counters that the investment boom in data centres is matched by a boom in renewable energy, and that private companies are funding much of the transition away from coal. But environmental groups point out that no data centre operator has adequately demonstrated they're actually driving renewable growth rather than simply using it.

Water presents an equally acute problem. Some data centres consume up to 40 million litres daily—equivalent to the supply for 80,000 households—to cool their servers. Sydney Water estimates that data centres could claim 25 percent of Sydney's drinking water by 2035. In a drought-prone country facing growing population demands, this is a crisis in waiting. The city already needs to expand its water supply over the next five to ten years. If data centres claim a quarter of it, households will likely pay for alternatives like desalination, which costs far more than traditional sources. In July, Prime Minister Anthony Albanese announced new regulations requiring large-scale data centres to guarantee their power supplies, limit water use, and fund any additional water infrastructure they require. But the legislation won't take effect until 2027 and applies only to new proposals—not to the projects already approved or under construction.

For communities like Lane Cove, the infrastructure boom feels imposed rather than chosen. At a town hall organised by Greenpeace Australia Pacific, residents said they were never consulted about their area becoming a data centre hub. One proposed facility sits just 16 metres from the nearest home and 160 metres from a primary school. If the four planned data centres are approved, Lane Cove deputy mayor Rochelle Flood says, half of the current businesses in the industrial park will be forced to relocate, taking their jobs with them. Felipe Tanaka, 40, manages a business in that park and has been told to move. "We never knew that something like this would happen," he told the BBC. "Thousands of jobs are going to be gone from this area in the next few years." While large data centres employ over a thousand workers during construction, that number drops to roughly 100 once operational. Tanaka's business employs 300 to 400 people, mostly locals. Relocation will likely cost him half his workforce.

The employment argument itself is contested. NSW Treasurer Mookhey suggests the real jobs come not from working in the data centres but from companies using them—Microsoft and Amazon locating skilled operations in the state. But what those operations will actually do remains unclear. Some critics have pointed out that many AI applications amount to generating cat GIFs, which consumes as much energy as running a microwave for an hour. Flood's frustration cuts to the heart of the uncertainty: "They're telling us this is essential, that we need to have these centres in our neighbourhood but they're not saying what it's for. When our drinking water, energy and land is being used for generative AI slop, that is not giving any value back." As more Australians find themselves living beside these vast, humming machines, the question of whether the country's rush to become an AI infrastructure hub is worth the cost remains genuinely open.