River Derwent at Alvaston 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.
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.
Operational Summary - 2021-2023
1184.1 hours | 4.5
The declared body of water receiving this discharge is the "River Derwent"
This station has discharged sewage 202 time(s).
The station has discharged for a total of 1184.1 hour(s).
This is 4.5% of the time which we have data for.
In total: 49 day(s)* of elapsed time.
86 | 3679.2 hours
This monitor has been operational for 86% of its total time we have data for.
There are 3679.2 hours unaccounted for due to downtime of the monitor.
The worst year in our records for the "Alvaston CSO" is 2023, discharging sewage for 575.4 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
575.4 hours | 6.56
The declared body of water receiving this discharge is the "River Derwent"
This station discharged sewage 82 time(s) during 2023.
The station discharged for a total of 575.4 hour(s).
This is around 23 day(s)* or 6.56% of the year.
The following reasons have been given for the high spill frequency in 2023:
Data Collection - Confirmed Exceptional Weather – Remaining Spills Not Above Soaf Threshold
The following comments have been given on the station operators intended actions:
Resolved - January After Reporting Year
100 | 0 hours
This monitor was operational for 100% of the year.
Leaving 0 hours unaccounted for in the data.
*This is total time in days, not individual days of the year.
Permit & Governance
| Attribute | Value |
|---|---|
| Governing Body | The Environment Agency |
| Operator | Severn Trent Water |
| Primary Permit # | T/48/45201/O |
| Secondary Permit # | T/48/45201/O |
2022
261.7 hours | 2.98
The declared body of water receiving this discharge is the "River Derwent"
This station discharged sewage 60 time(s) during 2022.
The station discharged for a total of 261.7 hour(s).
This is around 10 day(s)* or 2.98% of the year.
100 | 0 hours
This monitor was operational for 100% of the year.
Leaving 0 hours unaccounted for in the data.
*This is total time in days, not individual days of the year.
Permit & Governance
| Attribute | Value |
|---|---|
| Governing Body | The Environment Agency |
| Operator | Severn Trent Water |
| Primary Permit # | T/48/45201/O |
| Secondary Permit # | T/48/45201/O |
2021
Note: Data is potentially unreliable in 2021
Due to high unavailability of the monitor
River Derwent | 60 Spills | Due to high unavailability of the monitor
346.9 hours | 3.96
The declared body of water receiving this discharge is the "River Derwent"
This station discharged sewage 60 time(s) during 2021.
The station discharged for a total of 346.9 hour(s).
This is around 14 day(s)* or 3.96% of the year.
The following comments have been given on the station operators intended actions:
Scheduled
58.1 | 3667.8 hours
This monitor was operational for 58.1% of the year.
Leaving 3667.8 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 2021:
Installation Set-Up/Design Issue
The following description has been given for downtime related actions intended, or taken, by the operator in 2021:
Resolved - June
*This is total time in days, not individual days of the year.
Permit & Governance
| Attribute | Value |
|---|---|
| Governing Body | The Environment Agency |
| Operator | Severn Trent Water |
| Primary Permit # | T/48/45201/O |
| Secondary Permit # | T/48/45201/O |
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Operator comments are presented, unedited, as they were received by us and do not reflect our views or position
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Station Data Information
Station overseen (meaning either provided, or regulated) by: The Environment Agency
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Please note that FloodMapper does not verify or check the accuracy of the data provided by third parties. The data is used as received from the source. Any underlying errors, inconsistencies, or inaccuracies in the original data will be reflected in the information presented on our platform. Users are advised to exercise their own judgment and caution when using the data for decision-making purposes.
Information about our data sources and licenses can be found
The information displayed here is used under license. We are not affiliated with any governing, or other, bodies. Nor do they necessarily endorse us, or us them.
Please note that FloodMapper does not verify or check the accuracy of the data provided by third parties. The data is used as received from the source. Any underlying errors, inconsistencies, or inaccuracies in the original data will be reflected in the information presented on our platform. Users are advised to exercise their own judgment and caution when using the data for decision-making purposes.
Information about our data sources and licenses can be found
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