For decades, the cloud was a convenient metaphor: a fluffy, weightless place where our emails, photos, and business spreadsheets lived. But in 2026, the metaphor has been stripped away to reveal a massive, resource-hungry reality. Across Australia, particularly in Sydney and Melbourne, data centres are rising at an unprecedented rate.
Driven by the demands of artificial intelligence (AI), Australia’s data centre capacity is projected to more than double by 2030, rising from 1,350 MW to over 3,100 MW. While this signals a digital gold rush for the economy, it brings a confronting environmental and logistical question: as these digital factories expand, would you actually want one on your work premises?
Turns out, using AI is thirsty work
According to ABC News, AI workloads are expected to consume up to one-quarter of Sydney’s total water supply within the next decade. This raises a red flag: in a country defined by drought and water scarcity, the digital revolution is a thirsty one.
If you’re wondering why a few AI prompts are placing our water supply at risk, it’s because data centres generate immense heat. To keep thousands of servers from melting down, they require cooling systems that evaporate millions of litres of water. In Sydney alone, demand could reach 250 megalitres per day by 2035.
Would you want a data centre on your work premises?
In a recent MIT Technology Review article, the paradox of the data centre was laid bare: they are “amazing” pieces of infrastructure that “everyone hates.” We love the low-latency AI tools and the seamless streaming they provide, but we are less enamoured when a massive, windowless concrete box—humming with the sound of industrial fans and sucking power from an already strained grid—moves in next door.
In Australia, our 314 data centres already consume about 2% of the national grid, a figure expected to hit 6% by 2030. In NSW, they already account for a staggering 11% of all electricity use. For a business considering on-prem infrastructure, these numbers represent significant overheads.
This brings us to the pivotal question: Would you want a data centre on your work premises?
For years, the trend has been to migrate to the cloud: outsourcing your data to giants like AWS, Microsoft, or NEXTDC. But as data sovereignty laws tighten and AI requires faster processing, some firms are looking back to on-premise solutions.
The case for on-prem:
- Security and control: For industries like finance or law, having your data physically located on your premises provides a level of security that the public cloud can’t always guarantee.
- Latency: If your business relies on real-time data processing (like high-frequency trading or advanced manufacturing), having the brain of your operation in the next room rather than a suburb away can be a competitive edge.
- Independence: You aren’t at the mercy of a third-party provider’s price hikes or service outages.
The case against:
- The resource burden: Hosting a modern, AI-ready data centre means taking on the massive electricity and water bills yourself. You become responsible for the cooling infrastructure that’s straining city resources.
- Maintenance debt: Unlike the cloud, which scales with a click, on-prem hardware requires physical upkeep, specialised IT staff, and constant upgrades.
- The noisy neighbour: The noise, heat, and space requirements can make a data centre a bad neighbour, even to your own employees.
Be mindful of your footprint
Australia is positioned as a global hub for AI expansion, but that goal comes with a price tag. Whether you choose to host your own servers or rent space in the cloud, the reality remains: our digital lives now have a physical footprint that can’t be ignored. As we’ve written about previously, please use AI thoughtfully. Save the heavier multimedia or long-form requests for cases where they genuinely add value, or ask a human.
