In County Mayo, Ireland, a proposed data centre in Killala has become a focal point of environmental and community concern. The development, planned by Mayo Data Hub Ltd., aims to construct a 29,076-square-metre facility at the former Asahi site in Killala Business Park. This project has faced significant opposition, notably from acclaimed author Sally Rooney, who has described it as a "wasteful, unnecessary and environmentally toxic proposal." (irishtimes.com)
Environmental Concerns and Opposition
Sally Rooney, a resident of County Mayo, submitted a detailed objection to Mayo County Council, highlighting the environmental implications of the proposed data centre. She pointed out that in 2023, private corporate data centres accounted for 21% of Ireland’s total electricity usage, surpassing the combined consumption of all urban households. Rooney expressed concern that such developments could lead to increased carbon emissions and potential power blackouts, emphasizing the need for sustainable energy solutions. (irishtimes.com)
Support from the Green Party
In contrast, the Mayo Green Party has expressed support for the data centre, provided it operates sustainably. Micheál Ó Conaill, chairperson of the Mayo Green Party, stated that data centres are crucial for Ireland’s digital and economic future. He emphasized the importance of ensuring these facilities adhere to climate obligations and suggested that the Killala site could be suitable if powered by 100% locally generated wind energy. (con-telegraph.ie)
Planning Process and Delays
The planning process for the Killala data centre has experienced delays. Initially, a decision was expected in January 2025, but Mayo County Council sought further information from the developer, extending the timeline. A new decision date was set for April 28, 2025. The council’s request for additional information focused on aspects such as energy sourcing, compliance with grid connection requirements, and the environmental impact of the development. (westernpeople.ie)
Recent Developments
As of April 30, 2025, Mayo County Council granted planning approval for the data centre and a battery energy storage system (BESS) facility at the former Asahi site. The data centre is expected to be a two-storey building covering 29,076 square metres, including data halls and associated infrastructure. The approval is contingent upon the developer meeting specific conditions, including adherence to environmental and energy standards. (westernpeople.ie)
Conclusion
The proposed data centre in Killala has sparked a complex debate balancing technological advancement with environmental sustainability. While the development promises economic benefits and supports Ireland’s digital infrastructure, it also raises significant environmental concerns. The project’s future will depend on the developer’s ability to address these concerns and comply with the conditions set forth by Mayo County Council.
