Event Duration Monitoring-Storm Overflow-Start/Stop Detailed Data

Published by:
Environment Agency
Last updated:
06 July 2026
Topic:
Not added
Licence:
Other Licence
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Summary

This Water Company data shows storm overflow event duration monitor activations. The activations are recorded at the start and the stop of each potential discharge. The data has not been subject to any formal verification by the Environment Agency. The data covers all 10 water and Sewerage companies that operate in England. The data is split into Water Companies and each spreadsheet covers one calendar year. Attribution statement: © Environment Agency copyright and/or database right 2026. All rights reserved.

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Link to the data Format File added Data preview
Event Duration Monitoring - Storm Overflows - Annual Returns N/A 06 July 2026 Not available
Yorkshire 2025 Detailed EDM Data.xlsx XLSX 06 July 2026 Not available
Yorkshire 2024 Detailed EDM Data.csv CSV 06 July 2026 Preview
Wessex 2025 Detailed EDM Data.xlsx XLSX 06 July 2026 Not available
Wessex 2024 Detailed EDM Data.csv CSV 06 July 2026 Preview
Welsh Water 2025 Detailed EDM Data.xlsx XLSX 06 July 2026 Not available
Welsh 2024 Detailed EDM Data.xlsx XLSX 06 July 2026 Not available
United Utilities 2025 Detailed EDM Data.csv CSV 06 July 2026 Preview
United Utilities 2024 Detailed EDM Data.csv CSV 06 July 2026 Preview
Thames Water 2025 EDM Detailed Data.xlsx XLSX 06 July 2026 Not available
Thames 2024 Detailed EDM Data.csv CSV 06 July 2026 Preview
Technical Detail DSP April 2026.docx DOCX 06 July 2026 Not available
Southern Water 2025 EDM Detailed Data.xlsx XLSX 06 July 2026 Not available
Southern 2024 Detailed EDM Data.csv CSV 06 July 2026 Preview
South West Water 2025 Detailed EDM Data.csv CSV 06 July 2026 Preview
South West 2024 Detailed EDM Data.xlsx XLSX 06 July 2026 Not available
Severn Trent 2025 Detailed EDM Data.csv CSV 06 July 2026 Preview
Severn Trent 2024 Detailed EDM Data.xlsx XLSX 06 July 2026 Not available
Northumbrian 2025 Detailed EDM Data.csv CSV 06 July 2026 Preview
Northumbrian 2024 Detailed EDM Data.csv CSV 06 July 2026 Preview
Anglian 2024 Detailed EDM Data.xlsx XLSX 06 July 2026 Not available

Additional information

View additional metadata
Added to data.gov.uk
2026-06-26
Access contraints
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Harvest GUID
e9677ac1-fd32-4ceb-88a0-2735be5f27c7
Extent
Latitude: 55.816° to °
Longitude: -6.236° to 2.072°
Spatial reference system
http://www.opengis.net/def/crs/EPSG/0/27700
Dataset reference date
2024-12-31 (creation)
2026-04-30 (publication)
2026-06-26 (revision)
Frequency of update
annually
Responsible party
Environment Agency (pointOfContact)
ISO 19139 resource type
dataset
Metadata language
eng
Source Metadata
XML
HTML

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Licence information

Open Government Licence