River Basins North West Mersey Upper Bollin Dean Mersey Upper Bollin (Source to Dean) Westminster Road CSO
River Bollin at Westminster 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.
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
816.7 hours | 3.1
The declared body of water receiving this discharge is the "River Bollin"
This station has discharged sewage 257 time(s).
The station has discharged for a total of 816.7 hour(s).
This is 3.1% of the time which we have data for.
In total: 34 day(s)* of elapsed time.
80 | 5256 hours
This monitor has been operational for 80% of its total time we have data for.
There are 5256 hours unaccounted for due to downtime of the monitor.
The worst year in our records for the "Westminster Road CSO" is 2021, discharging sewage for 596.1 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
140.4 hours | 1.6
The declared body of water receiving this discharge is the "River Bollin"
This station discharged sewage 82 time(s) during 2023.
The station discharged for a total of 140.4 hour(s).
This is around 5 day(s)* or 1.6% 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
79.1 | 1825.5 hours
This monitor was operational for 79.1% of the year.
Leaving 1825.5 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
| Attribute | Value |
|---|---|
| Governing Body | The Environment Agency |
| Operator | United Utilities |
| Primary Permit # | 016892096 |
| Secondary Permit # | MAC0062 |
2022
Note: Data is potentially unreliable in 2022
Due to high unavailability of the monitor
River Bollin | 67 Spills | Due to high unavailability of the monitor
80.1 hours | 0.91
The declared body of water receiving this discharge is the "River Bollin"
This station discharged sewage 67 time(s) during 2022.
The station discharged for a total of 80.1 hour(s).
This is around 3 day(s)* or 0.91% of the year.
The following reasons have been given for the high spill frequency in 2022:
Not Asset Maintenance - Hydraulic Capacity
The following comments have been given on the station operators intended actions:
N/A - Hydraulic Capacity
64 | 3147.4 hours
This monitor was operational for 64% of the year.
Leaving 3147.4 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 2022:
Telemetry Or Data Archiving Failure / Issue
The following description has been given for downtime related actions intended, or taken, by the operator in 2022:
N/A - Ongoing Investigation
*This is total time in days, not individual days of the year.
Permit & Governance
| Attribute | Value |
|---|---|
| Governing Body | The Environment Agency |
| Operator | United Utilities |
| Primary Permit # | 016892096 |
| Secondary Permit # | MAC0062 |
2021
596.1 hours | 6.8
The declared body of water receiving this discharge is the "River Bollin"
This station discharged sewage 108 time(s) during 2021.
The station discharged for a total of 596.1 hour(s).
This is around 24 day(s)* or 6.8% of the year.
The following reasons have been given for the high spill frequency in 2021:
Not Asset Maintenance - Hydraulic Capacity
The following comments have been given on the station operators intended actions:
N/A - Hydraulic Capacity
97 | 262.8 hours
This monitor was operational for 97% of the year.
Leaving 262.8 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 | United Utilities |
| Primary Permit # | 016892096 |
| Secondary Permit # | MAC0062 |
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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
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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