Our 2025 EDM data

We’ve published our Event Duration Monitoring (EDM) data for 2025. This data is released on an annual basis and contains all the monitoring activity at storm overflows across the Severn Trent region.

As part of our Get River Positive pledges, we have committed to ensuring we are open and transparent and provide information such as this on our website and in an easily accessible way. Our event duration monitor (EDM) data is subjected to several levels of internal and external assurance before reporting to the regulators. 

We have delivered at least 2700 improvements across our network and assets to reduce spills since the beginning of our investment in 2023.