As data centres grow to meet the increasing demand for data computation, their environmental impact continues to rise. Although various best practices and KPIs have been developed to mitigate this, establishing a comprehensive sustainability framework remains a challenge. Some existing holistic certification schemes have been applied; however, they still don't fully account for the unique functionality and the impact of data centres. This session explores key areas for enhancement within a widely used certification framework and evaluates its effectiveness using real-world data for comparison.