Growing water scarcity, stricter bathing water regulation, and increasing hydraulic variability driven by climate change are accelerating the need for resilient, low-impact wastewater disinfection. Conventional chlorine and UV systems can struggle to maintain consistent performance under fluctuating flows while minimising by-products, energy demand, and operational risk. This presentation describes an award-winning, disinfection concept that combines on-site generated performic acid with continuous monitoring and automated dose control. Real-time data on flow, effluent quality, and process conditions are used to dynamically optimise dosing, ensuring robust pathogen reduction with minimal chemical consumption. The digital layer enhances operational visibility, supports rapid response during storm and rainfall events, and reduces the risk of downstream bathing water non-compliance, directly contributing to zero-pollution objectives. The approach has been applied in high-profile urban environments, including disinfection of treated wastewater contributing to safe bathing water conditions for the Paris 2024 Olympic Games and beyond. This application highlights the capability of digitally optimised disinfection to perform reliably under stringent regulatory, public health, and environmental scrutiny. Operational experience demonstrates how treated final effluent can be made water fit for purpose for reuse and recreational protection. Eliminating chlorine handling and reducing reliance on energy-intensive UV systems improves safety, asset resilience, and carbon efficiency, supporting future-ready, connected wastewater treatment strategies.