Australia is experiencing a significant expansion in data center development, driven by the increasing demands of artificial intelligence (AI) and cloud computing. This rapid growth, particularly in Victoria, has led to substantial private investment and government efforts to position the state as a digital economy leader.
However, the expansion has also sparked concerns among local councils, residents, and environmental advocates regarding infrastructure strain, substantial energy and water consumption, potential environmental impacts, and local community disruptions.
Data Center Growth and Economic Drivers
Data centers, described as the physical infrastructure of the internet and "factories of the 21st century," are large industrial facilities housing servers and cabling essential for digital services.
Australia has become the Asia-Pacific's third-largest data center market, valued at $30 billion, with major players including AirTrunk, Amazon Web Services, CDC, Microsoft, and NextDC. Global investment in the sector is projected to reach US$700 billion by 2026.
The Victorian state government has actively sought to attract this investment, aiming for $25 billion in private capital expenditure and economic renewal. Officials, including Premier Jacinta Allan and Minister for Economic Growth and Jobs Danny Pearson, have engaged extensively with major tech companies and data center developers.
The government has facilitated development by fast-tracking planning approvals. For instance, a $911 million NextDC digital hub in Port Melbourne received approval in 75 days, significantly faster than the typical 173 days for similar metropolitan industrial permits. This approach aims to compete with other states, such as New South Wales, which currently holds 56% of Australia's data center market compared to Victoria's one-third share.
The government suggests that data centers can contribute to decarbonization through power purchase agreements (PPAs) for renewable energy and support thousands of construction jobs, with hundreds of ongoing roles.
Energy and Water Consumption Concerns
The substantial energy and water requirements of data centers, primarily for cooling servers that generate heat, have raised significant concerns.
Energy Consumption
- The Australian Energy Market Operator (AEMO) reported that data centers accounted for approximately 2% of Australia's national grid electricity in 2025, with projections indicating this could triple within five years and reach 9% by 2035.
- For Melbourne specifically, AEMO forecasts data centers to increase from 2% of the electricity grid's use in 2025 to 19% by 2050.
- By 2030, AEMO projects data center energy demands could surpass the power consumed by the nation's electric vehicle fleet.
- By 2035, the industry's power consumption could reach 21.4 terawatt hours, nearly equivalent to the annual consumption of Australia's four aluminum smelters. AGL, a major electricity provider, anticipates demand might exceed AEMO's forecasts.
- Globally, data center power demand is increasing four times faster than all other sectors, according to the International Energy Agency (IEA).
- A single hyperscale AI-focused data center (100 megawatts or more) could potentially consume as much electricity annually as 100,000 households.
Water Usage
- Greater Western Water is evaluating 19 data center proposals in Melbourne that collectively request 20 gigalitres of water annually. This volume is equivalent to the amount consumed by 330,000 Melbourne residents in the previous financial year, or 4% of Melbourne's total water usage.
- Melbourne Water warned in December that hyper-scale data center applications projected water demands that could exceed those of nearly all top 30 non-residential customers in Melbourne.
- The industry anticipates consuming 1% of Melbourne’s and 2% of Sydney’s water supply in the near future.
- While the industry disputes the methodology, projections by Sydney's annual water pricing ruling have warned that cooling data centers could consume a quarter of the city's drinking water by 2035.
RMIT Professor Gary Rosengarten noted that while advanced cooling technologies can reduce water use, they often require increased electricity consumption.
Infrastructure Challenges and Regulatory Debates
The projected surge in demand has led to disputes over necessary power grid overhauls.
Jemena, the electricity distribution infrastructure owner in Melbourne's north-west, is in a $260 million dispute with the Australian Energy Regulator (AER). Jemena sought approval to collect approximately $2 billion in revenue from customers between 2026 and 2031 to manage an expected doubling in electricity demand from data centers and residential transitions to electricity.
The AER, supported by an independent review, proposed a lower revenue allowance of $1.7 billion, deeming Jemena's demand forecasts "overstated," "subjective," and "lacking in transparency." The regulator expressed concern that residents might bear the costs for unnecessary infrastructure upgrades if predicted data centers do not materialize. Victoria's Energy Minister Lily D'Ambrosio publicly supported the AER's position, emphasizing energy affordability for Victorians.
Jemena, serving 380,000 customers, projects electricity demand to double by 2031, citing a 4.1-gigawatt pipeline of data center inquiries, representing half of Victoria's entire peak energy demand. Jemena warned that insufficient regulatory allowance could lead to power outages and connection delays. Even with a revised methodology focusing on committed projects, Jemena still forecasts over 3.2 gigawatts of demand, more than a third of the state's current peak.
Data Centres Australia (DCA) CEO Belinda Dennett identified a bottleneck of energy connections in Melbourne's north-west, advocating for expedited substation upgrades. DCA projects Melbourne's data center capacity to grow from 0.4 gigawatts to nearly 1.2 gigawatts by 2030.
The AER is expected to issue a final decision on Jemena's revised proposal in April 2026, clarifying that data centers must cover their connection costs, including shared network expenses.
Local Community Impacts
The rapid construction of hyperscale data centers, particularly in suburban areas like West Footscray, Melbourne, has led to local disruptions and resident concerns.
Residents have reported increased noise, dust, and light pollution from security and construction activities, leading to difficulties for shift workers and affecting quality of life.
Some residents have considered or proceeded with selling their homes due to the proximity and impact of these facilities. Construction has involved frequent street excavations for power and data cabling. One local business owner, Thanh Thai, declined to sell his engineering and gardening business property to NextDC due to the high costs associated with relocating specialized equipment. A pediatric doctor reported difficulties due to high-intensity security lighting and frequent seven-day work weeks near a construction site.
Perspectives and Debates
Environmental Impact
- Critics, including Victorian Greens leader Ellen Sandell and some researchers, argue that data center demand strains the grid and may necessitate continued reliance on coal and gas if renewable energy generation does not expand commensurately.
- Dr. Dylan McConnell, an energy systems researcher at the University of NSW, stated that data center growth would likely impact the overall cost of electricity, leading to higher power prices and potentially a 14% rise in grid emissions by 2035 due to reliance on expensive gas peaking generation.
- However, industry groups like DCA reject the "energy vampire" label, asserting that data centers are more efficient than office-based servers and that energy and water consumption forecasts are often inflated by speculative applications. DCA reports that PPAs and onsite solar cover approximately 70% of the industry's energy consumption.
Economic Benefits and Employment
- While the Victorian government highlights the creation of thousands of construction jobs and hundreds of ongoing roles, economists and geographers such as Todd Denham and Ewan Rankin argue that these capital-intensive facilities are essentially low-employment "storage facilities" that do not create significant ongoing employment.
- Planning documents for major data centers indicate relatively low permanent staffing numbers, with some large facilities projected to have fewer than 50 employees.
- Industry representatives counter that data centers revitalize dormant industrial land and are vital infrastructure, underpinning other modern, high-skilled jobs.
Regulatory Frameworks
- The City of Melbourne council unanimously voted to explore responsible AI infrastructure and data center use, calling for advocacy to the Victorian and federal governments to establish regulatory frameworks and transparent monitoring requirements for their water consumption, energy use, and greenhouse gas emissions.
- Hume council, in Melbourne's outer north, also voted to develop a framework for assessing data center applications for sustainable resource use, becoming the first Victorian council to do so.
- Conversely, Minister Danny Pearson indicated that Victoria aims for "light regulation" in the sector to attract investment.
International Context
While Australia's data center market is expanding, industry representatives distinguish its regulated development process from the "chaotic" expansion observed in the United States.
In the US, electricity bills have significantly increased in data-center-dense areas, and some tech companies are exploring reopening nuclear reactors for power, such as Microsoft's reported deal at Three Mile Island. Former President Donald Trump has proposed that technology companies meet their own power needs to avoid increasing consumer electricity bills. The US has approximately 5,400 data centers with 54 gigawatts of capacity, compared to Australia's roughly 250 centers with 1.4 gigawatts.
Outlook
Residents anticipate ongoing construction and operational impacts for years as additional stages are planned for existing data center sites.
The Australian Energy Regulator is expected to make a final decision on key power grid upgrade funding in April 2026, aiming to balance consumer costs for reliable energy with the demands of an evolving market. The ongoing expansion continues to highlight the tension between digital economic growth and local community and environmental considerations.