Search Environment Agency annual storm overflow monitoring returns for England. View published outlet locations, counted spills, total spill duration and monitor operation for the years available between 2020 and 2025. Compare annual figures for individual outlets where records can be reliably matched across years.
Environment Agency storm overflow annual returns for England, covering reporting years 2020 to 2025 where published data and reliable record matching allow. Records reflect the relevant annual return and any documented corrections.
5 reporting years · North Brook
4 reporting years · Dorchester Mill Stream
5 reporting years · Gore Brook
6 reporting years · Cattle Brook
4 reporting years · Warmley Brook Via Sws
4 reporting years · River Trym Via Sws
5 reporting years · River Plym Via Sws (Estuarine)
5 reporting years · River Ribble via a surface water sewer
5 reporting years · River Dane Via Sws
5 reporting years · Trib Of River Douglas Via Sws
5 reporting years · River Exe Via Sws
5 reporting years · Trib Torkington Brook Via Sws
The Environment Agency's annual returns report storm overflow monitoring information supplied by water companies. Spill counts use the regulatory 12/24-hour block method, so a counted spill is not necessarily a single uninterrupted discharge. Duration is the reported total time in spill, rather than the volume of sewage discharged. Monitor operation indicates the percentage of the reporting period for which the monitor operated. Missing values, incomplete monitoring and changes in recorded outlet details can affect comparisons between years. These annual figures describe historical reporting periods, not live discharge conditions or the cause of sewage problems at an individual property.
Describe the affected area and the type of assistance you are seeking, such as sewage removal, tank cleaning or pump station cleaning. Include any information already available about the source of the problem.
Contains Environment Agency information © Environment Agency copyright and database right 2025, licensed under the Open Government Licence v3.0.
Data retrieved: 27 Oct 2026, 11:58 GMT · Published data snapshot: 2025
Open Government Licence v3.0Contains Environment Agency information © Environment Agency copyright and database right 2024, licensed under the Open Government Licence v3.0.
Data retrieved: 27 Oct 2026, 11:58 GMT · Published data snapshot: 2024
Open Government Licence v3.0Contains Environment Agency information © Environment Agency copyright and database right 2023, licensed under the Open Government Licence v3.0.
Data retrieved: 27 Oct 2026, 11:58 GMT · Published data snapshot: 2023
Open Government Licence v3.0Contains Environment Agency information © Environment Agency copyright and database right 2022, licensed under the Open Government Licence v3.0.
Data retrieved: 27 Oct 2026, 11:58 GMT · Published data snapshot: 2022
Open Government Licence v3.0Contains Environment Agency information © Environment Agency copyright and database right 2021, licensed under the Open Government Licence v3.0.
Data retrieved: 27 Oct 2026, 11:58 GMT · Published data snapshot: 2021
Open Government Licence v3.0Contains Environment Agency information © Environment Agency copyright and database right 2020, licensed under the Open Government Licence v3.0.
Data retrieved: 27 Oct 2026, 11:58 GMT · Published data snapshot: 2020
Open Government Licence v3.0Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026.
Data retrieved: 27 Oct 2026, 12:04 GMT
Open Government Licence v3.0