Implementing the Industrial Emissions Directive (IED) within live operational sites presents significant technical and organisational challenges, particularly across active treatment and bioresource facilities. Drawing on experience from major upgrade programmes at Esholt, Sandall and Dewsbury on behalf of Yorkshire Water, this presentation sets out a practical approach to embedding IED requirements without compromising safety, operational continuity, or regulatory compliance. The session focuses on translating regulatory intent into deliverable site solutions, with emphasis on early integration within design and construction, clear ownership across multi-disciplinary teams, and effective management of operational interfaces. Key themes include methane abatement, emissions monitoring, and alignment with Best Available Techniques (BAT) in constrained, live environments. Common challenges encountered across these sites are explored alongside pragmatic mitigation strategies. Real-world examples demonstrate how phased delivery, temporary works, and adaptive commissioning approaches have been applied to maintain compliance while minimising disruption to ongoing operations. A central theme is the transition from compliance as a checklist exercise to a proactive, value-driven approach that enhances asset performance and environmental outcomes. The presentation concludes by identifying critical success factors—early collaboration, structured assurance, and strong stakeholder engagement—providing practitioners with practical insights to deliver robust, sustainable IED solutions on live operational sites.