Colt DCS Reports 27% Reduction in Greenhouse Gas Emissions

• Delivered 27% reduction in greenhouse gas emissions in Scope 1, 2 (market based) and 3 compared to 2019 base year  
• Achieved 100% renewable electricity in Scope 2 and 90% renewable share of total energy consumption (Scopes 1, 2 and 3). 
• Advanced Global Reference Design (GRD), embedding lower-carbon materials, energy-efficient systems, and near-zero wastewater cooling into new architectural developments. 

Colt Data Centre Services (Colt DCS), a global provider of AI-ready, hyperscale and large enterprise data centre solutions, today announced the publication of its fourth annual Sustainability Report.   
 
The report outlines the company’s sustainability performance over 2025 and includes data across its environmental, social, and governance (ESG) material topics, identified and prioritised through a Double Materiality Assessment conducted in 2024.  
 
It reveals that Colt DCS has delivered a 27% reduction in greenhouse gas emissions in Scope 1, 2 (market-based) and 3 compared to the 2019 base year.   
 
Last year, the data centre provider also sourced 100% renewable electricity in Scope 2, through renewable energy certificates, and a 90% renewable share of total energy consumption (Scopes 1, 2 and 3). 
 
This reduction reflects the company’s continued commitment to decarbonising the design, development, and operation of its data centres.   

Building on this approach, Colt DCS advanced its Global Reference Design (GRD) in 2025, further developing a repeatable, standardised blueprint that is flexible enough to adapt to local requirements while maintaining consistency in its core principles across future developments. The GRD embeds energy-efficient systems, lower embodied carbon materials and near-zero wastewater cooling technologies into all new data centre architecture, while targeting an annualised PUE below 1.2 and waste diversion rates of 75% in construction and demolition and 90% in operations.

Addressing water use, the GRD incorporates chilled water systems using low-GWP refrigerants with near-zero water consumption, alongside rainwater harvesting for non-potable indoor use. Closed-loop liquid cooling systems circulate coolant in a sealed loop, transferring heat without relying on evaporation.

Further key features from the 2025 Sustainability Report include: 

• Achieved the Great Place To Work certification, with 92% of employees recommending Colt DCS as a top employer (up from 87% in 2024). 
• Won The Best Talent Developer of the Year at the Data Centre World Awards. 
• Attained TRUE Zero Waste certification across 3 sites, including London North, Tokyo Inzai 1-3 and Osaka Keihanna. 
• Reached a global PUE of 1.41. 
• Secured ISO 27001 Information Security Management System certification globally, and ISO 14001 Environmental Management System certification across the UK and Europe.