Event Duration Monitoring - Storm Overflows - Annual Returns

• Published by: Environment Agency
• Last updated: 27 March 2024
• Topic: Not added
• Licence: Other Licence ; View licence information

Summary

This Event Duration Monitoring (EDM) dataset relates to the performance of storm overflows in England. Data are provided by Water and Sewerage Companies (WaSCs) to the Environment Agency each year as part of their regulatory Annual Return, to fulfil their permitted conditions to discharge from these storm overflows under the Environmental Permitting Regulations.

Data files are provided by year (2023, 2022, 2021 & 2020) and include a sheet for each of the 10 WaSCs with storm overflows in England. Each WaSC sheet shows how often and how long each monitored storm overflow discharged during that year. From 2021 onwards the dataset also includes reasons why event duration monitors (EDM) may have provided information for <90% of the relevant return period, and why an overflow may have high spill counts in that period. These data reflect the best available information held by the WaSC at time of submission.

The data file for each year also contains key summary data tables. These include: number of storm overflows with EDM, number of storm overflows returning spill counts, average spill duration and average spill count for each WaSC. A dataset README guide is also provided which provides further information to help use and understand the data.

A fifth data file contains the annual key summary data from respective years plus a table showing long-term trends from 2016-2023. Attribution statement: © Environment Agency copyright and/or database right 2024. All rights reserved.

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Data links

Link to the data	Format	File added	Data preview
Storm Overflow - Spill Frequency Portal: Event Duration Monitoring (EDM) Data	N/A	27 March 2024	Not available
Event_Duration_Monitoring_-_Storm_Overflows_-2020.zip	ZIP	27 March 2024	Not available
EDM_Long-term_Trends_Storm_Overflow_Annual_Return.zip	ZIP	27 March 2024	Not available
EDM_2023_Storm_Overflow_Annual_Return.zip	ZIP	27 March 2024	Not available
EDM_2022_Storm_Overflow_Annual_Return.zip	ZIP	27 March 2024	Not available
EDM_2021_Storm_Overflow_Annual_Return.zip	ZIP	27 March 2024	Not available

Additional information

View additional metadata

• Added to data.gov.uk: 2024-03-27
• Access contraints: There are no public access constraints to this data. Use of this data is subject to the licence identified.
• Harvest GUID: 21e15f12-0df8-4bfc-b763-45226c16a8ac
• Extent: Latitude: 55.816° to 49.943°
• Extent: Longitude: -6.236° to 2.072°
• Spatial reference system: http://www.opengis.net/def/crs/EPSG/0/27700
• Dataset reference date: 2021-03-30 (creation)
• Dataset reference date: 2024-03-27 (revision)
• Frequency of update: annually
• Responsible party: Environment Agency (pointOfContact)
• ISO 19139 resource type: dataset
• Metadata language: eng
• Source Metadata: XML
• Source Metadata: HTML

Contact

Enquiries

Access DSP Support pages: https://environment.data.gov.uk/support

Freedom of Information (FOI) requests

National Customer Contact Centre Freedom of information requests for this dataset

Licence information

Open Government Licence