Data sources and licences
Each type of evidence has its own source and date. Annual spills, recent monitor activity and bathing-water classes are kept separate.
Annual storm overflow records
Environment Agency returns supply outlet names, permits, locations, spill counts, durations and monitor coverage. The main inventory uses the 2025 return, revised 21 August 2026. Earlier years appear only where a source record can be matched.
Open official source ↗Open Government Licence v3.0. © Environment Agency copyright and/or database right 2025. All rights reserved. Checked 9 September 2026.
Bathing-water locations and classes
The Environment Agency file supplies designated sites, approximate sample points and annual classifications. This release includes 464 active sites and excludes 25 de-designated records.
Open official source ↗© Environment Agency copyright and/or database right 2015. All rights reserved. Open Government Licence v3.0. Updated 6 July 2026; checked 9 September 2026.
Town and city points
Area pages use Office for National Statistics Built Up Areas, December 2022, representative points. We link outlets within 10 km in a straight line. These groups do not use town boundaries.
Open official source ↗Contains public sector information licensed under the Open Government Licence v3.0. Checked 9 September 2026.
Map tiles
CARTO Voyager supplies the background map and uses OpenStreetMap data. Outlet markers come from the sewage sources. The background does not establish public access or water quality.
Open official source ↗© OpenStreetMap contributors, © CARTO. Read the linked attribution and licence terms.
Recent monitor feeds
Nine checked company feeds are supplied through Stream. Each is licensed under CC BY 4.0. The live service checks them every 15 minutes; provider delays can still apply.
- Anglian feed
Anglian Water via Stream · CC BY 4.0
- Northumbrian feed
Northumbrian Water via Stream · CC BY 4.0
- Severn Trent feed
Severn Trent Water via Stream · CC BY 4.0
- South West feed
South West Water via Stream · CC BY 4.0
- Southern feed
Southern Water via Stream · CC BY 4.0
- Thames feed
Thames Water via Stream · CC BY 4.0
- United Utilities feed
United Utilities Water via Stream · CC BY 4.0
- Wessex feed
Wessex Water via Stream · CC BY 4.0
- Yorkshire feed
Yorkshire Water via Stream · CC BY 4.0
We normalise fields and statuses, remove identical duplicate rows and keep the last valid report if a response fails checks. Stream directory · CC BY 4.0 terms.