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River Colne at Bog Green Lane

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 Colne | 336 Spills |
1348.8 hours | 5.13


The declared body of water receiving this discharge is the "River Colne"
This station has discharged sewage 336 time(s).
The station has discharged for a total of 1348.8 hour(s).
This is 5.13% of the time which we have data for.
In total: 56 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 "Bog Green Lane" is 2023, discharging sewage for 956.2 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 Colne | 108 Spills |
956.2 hours | 10.91

The declared body of water receiving this discharge is the "River Colne"
This station discharged sewage 108 time(s) during 2023.
The station discharged for a total of 956.2 hour(s).
This is around 39 day(s)* or 10.91% 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

86.8 | 1151 hours
This monitor was operational for 86.8% of the year.
Leaving 1151 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 - Feb


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

Permit & Governance

AttributeValue
Governing BodyThe Environment Agency
OperatorYorkshire Water
Primary Permit #EPRUP3123GW
Secondary Permit #EPR/UP3123GW A1

2022
River Colne | 121 Spills |
136.2 hours | 1.55

The declared body of water receiving this discharge is the "River Colne"
This station discharged sewage 121 time(s) during 2022.
The station discharged for a total of 136.2 hour(s).
This is around 5 day(s)* or 1.55% 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

77.8 | 1942.9 hours
This monitor was operational for 77.8% of the year.
Leaving 1942.9 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 2022:
Comms Failure / Issue

The following description has been given for downtime related actions intended, or taken, by the operator in 2022:
Resolved - Dec


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

Permit & Governance

AttributeValue
Governing BodyThe Environment Agency
OperatorYorkshire Water
Primary Permit #EPRUP3123GW
Secondary Permit #EPR/UP3123GW A1

2021
River Colne | 107 Spills |
256.3 hours | 2.92

The declared body of water receiving this discharge is the "River Colne"
This station discharged sewage 107 time(s) during 2021.
The station discharged for a total of 256.3 hour(s).
This is around 10 day(s)* or 2.92% of the year.

95.1 | 429.2 hours
This monitor was operational for 95.1% of the year.
Leaving 429.2 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
OperatorYorkshire Water
Primary Permit #EPRUP3123GW
Secondary Permit #EPR/UP3123GW A1


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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
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Station Data Information
Station overseen (meaning either provided, or regulated) by: The Environment Agency
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