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River Severn at Thornhill Road CSO

This is a sewage discharge monitoring station, which is usually a type of Event Duration Monitor (EDM).
These stations themselves are designed to mitigate the impact of heavy rainfall by discharging, under permitted conditions, any overflow into a water body. They are often actively discharging during flood events.
This page presents the data acquired by the monitoring system for this discharge station.
Sewage Reports that include this Station
Operational Summary - 2021-2023
River Severn | 190 Spills |
300.7 hours | 1.14


The declared body of water receiving this discharge is the "River Severn"
This station has discharged sewage 190 time(s).
The station has discharged for a total of 300.7 hour(s).
This is 1.14% of the time which we have data for.
In total: 12 day(s)* of elapsed time.

63 | 9723.6 hours
This monitor has been operational for 63% of its total time we have data for.
There are 9723.6 hours unaccounted for due to downtime of the monitor.


The worst year in our records for the "Thornhill Road CSO" is 2022, discharging sewage for 184.6 hours of the year.

Uptimes below 90% (red line) should be accompanied by a reason
*This is total time in days, not individual days.
Yearly Summary
Most Recent Year - 2023
River Severn | 5 Spills |
19 hours | 0.21

The declared body of water receiving this discharge is the "River Severn"
This station discharged sewage 5 time(s) during 2023.
The station discharged for a total of 19 hour(s).
This is around 0 day(s)* or 0.21% of the year.

The following reasons have been given for the high spill frequency in 2023:
Not Asset Maintenance - Hydraulic Capacity

The following comments have been given on the station operators intended actions:
N/A - Hydraulic Capacity

39.1 | 5334.8 hours
This monitor was operational for 39.1% of the year.
Leaving 5334.8 hours unaccounted for in the data.
This falls below the 90% threshold where a reason should be given

The following reasons have been given for the downtime in 2023:
Sensor Failure / Issue

The following description has been given for downtime related actions intended, or taken, by the operator in 2023:
Resolved - Jul


*This is total time in days, not individual days of the year.

Permit & Governance

AttributeValue
Governing BodyThe Environment Agency
OperatorSevern Trent Water
Primary Permit #S/02/21009/O
Secondary Permit #S/02/21009/O

2022
River Severn | 148 Spills |
184.6 hours | 2.1

The declared body of water receiving this discharge is the "River Severn"
This station discharged sewage 148 time(s) during 2022.
The station discharged for a total of 184.6 hour(s).
This is around 7 day(s)* or 2.1% of the year.

The following reasons have been given for the high spill frequency in 2022:
N/A - Ongoing Investigation

The following comments have been given on the station operators intended actions:
Scheduled

96.3 | 317.9 hours
This monitor was operational for 96.3% of the year.
Leaving 317.9 hours unaccounted for in the data.


*This is total time in days, not individual days of the year.

Permit & Governance

AttributeValue
Governing BodyThe Environment Agency
OperatorSevern Trent Water
Primary Permit #S/02/21009/O
Secondary Permit #S/02/21009/O

2021
River Severn | 37 Spills |
96.9 hours | 1.1

The declared body of water receiving this discharge is the "River Severn"
This station discharged sewage 37 time(s) during 2021.
The station discharged for a total of 96.9 hour(s).
This is around 4 day(s)* or 1.1% of the year.

The following comments have been given on the station operators intended actions:
Scheduled

54.7 | 3963.9 hours
This monitor was operational for 54.7% of the year.
Leaving 3963.9 hours unaccounted for in the data.
This falls below the 90% threshold where a reason should be given

The following reasons have been given for the downtime in 2021:
Sensor Failure / Issue

The following description has been given for downtime related actions intended, or taken, by the operator in 2021:
Resolved - October


*This is total time in days, not individual days of the year.

Permit & Governance

AttributeValue
Governing BodyThe Environment Agency
OperatorSevern Trent Water
Primary Permit #S/02/21009/O
Secondary Permit #S/02/21009/O


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Operator comments are presented, unedited, as they were received by us and do not reflect our views or position

Local Information
Nearby Flood Warnings
None
Nearby Alert Areas
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Station Data Information
Station overseen (meaning either provided, or regulated) by: The Environment Agency
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