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River Darwen at Cann Bridge Street CSO 40042

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.
Operational Summary - 2021-2023
River Darwen | 225 Spills |
479.4 hours | 1.82


The declared body of water receiving this discharge is the "River Darwen"
This station has discharged sewage 225 time(s).
The station has discharged for a total of 479.4 hour(s).
This is 1.82% of the time which we have data for.
In total: 19 day(s)* of elapsed time.

98 | 525.6 hours
This monitor has been operational for 98% of its total time we have data for.
There are 525.6 hours unaccounted for due to downtime of the monitor.


The worst year in our records for the "Cann Bridge Street CSO 40042" is 2022, discharging sewage for 225.3 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 Darwen | 35 Spills |
62.4 hours | 0.71

The declared body of water receiving this discharge is the "River Darwen"
This station discharged sewage 35 time(s) during 2023.
The station discharged for a total of 62.4 hour(s).
This is around 2 day(s)* or 0.71% 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

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

AttributeValue
Governing BodyThe Environment Agency
OperatorUnited Utilities
Primary Permit #017160142
Secondary Permit #SRI0008

2022
River Darwen | 96 Spills |
225.3 hours | 2.57

The declared body of water receiving this discharge is the "River Darwen"
This station discharged sewage 96 time(s) during 2022.
The station discharged for a total of 225.3 hour(s).
This is around 9 day(s)* or 2.57% 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

94.5 | 476.5 hours
This monitor was operational for 94.5% of the year.
Leaving 476.5 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
OperatorUnited Utilities
Primary Permit #017160142
Secondary Permit #SRI0008

2021
River Darwen | 94 Spills |
191.7 hours | 2.18

The declared body of water receiving this discharge is the "River Darwen"
This station discharged sewage 94 time(s) during 2021.
The station discharged for a total of 191.7 hour(s).
This is around 7 day(s)* or 2.18% 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

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

AttributeValue
Governing BodyThe Environment Agency
OperatorUnited Utilities
Primary Permit #017160142
Secondary Permit #SRI0008


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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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