Track storm overflow discharge activity, nearby monitored sites, bathing-water proximity and annual company performance in one clearer view.
Event Duration Monitors indicate discharge activity. They do not prove pollution levels or provide real-time swimming safety advice.
Active now
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Monitored sites discharging now
Coastal
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Coastal or estuary, past 48h
Near bathing
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Sites near bathing waters, past 48h
Events
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Active and ended in the last 48h
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Showing 0 active or ended monitored sites from the last 48 hours
Modelled flow path from the outfall, not an impact zone. Dilution and die-off are not modelled.
Latest active and ended monitor events
Compare water companies by annual spill hours and spill counts from Event Duration Monitor returns.
Source: annual Event Duration Monitoring returns to the Environment Agency and Natural Resources Wales. Scottish Water reports separately to SEPA and is not included. Site counts are shown so the basis of each figure is visible.
Bathing waters
The 8 designated bathing waters with the most to report right now: advice against bathing first, then discharges nearby, then a raised pollution-risk forecast. Search a postcode to see the nearest ones instead.
Spill counts are storm overflow discharges started in the past 24 hours at monitored outfalls the Environment Agency links to that bathing water. They are not water-quality readings, and they cover England and Wales only. Classifications are the annual designation, which does not move with a single discharge.
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The storm-releases dashboard presents live or recent overflow activity, bathing-water context and water-company summaries where feeds are available. It is designed to make public environmental data easier to inspect, not to replace official bathing-water warnings or environmental enforcement records.
Storm overflows are designed to reduce sewer flooding during heavy rainfall by releasing excess flow into rivers or coastal waters. An event indicates that a monitored overflow has reported activity, but it does not by itself describe the exact pollution level at a bathing site.
Different water companies publish data using different systems and update schedules. A missing or inactive point can mean no recent event, delayed data, a feed issue or a site outside the currently monitored set.
Overflow activity can be relevant to swimmers and coastal communities, but bathing-water safety also depends on tides, rainfall, currents, bacteria testing and local warnings. Official advice should take priority for health and safety decisions.
