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Mells Stream at Oakhill WWTW

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
Mells Stream | 27 Spills |
261.8 hours | 0.99


The declared body of water receiving this discharge is the "Mells Stream"
This station has discharged sewage 27 time(s).
The station has discharged for a total of 261.8 hour(s).
This is 0.99% of the time which we have data for.
In total: 10 day(s)* of elapsed time.

94 | 1576.8 hours
This monitor has been operational for 94% of its total time we have data for.
There are 1576.8 hours unaccounted for due to downtime of the monitor.


The worst year in our records for the "Oakhill WWTW" is 2023, discharging sewage for 237.7 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
Mells Stream | 21 Spills |
237.7 hours | 2.71

The declared body of water receiving this discharge is the "Mells Stream"
This station discharged sewage 21 time(s) during 2023.
The station discharged for a total of 237.7 hour(s).
This is around 9 day(s)* or 2.71% of the year.

86.9 | 1144.9 hours
This monitor was operational for 86.9% of the year.
Leaving 1144.9 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 2023:
Comms Failure / Issue

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


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

Permit & Governance

AttributeValue
Governing BodyThe Environment Agency
OperatorWessex Water
Primary Permit #011557
Secondary Permit #13229S

2022
Mells Stream | 3 Spills |
12.8 hours | 0.14

The declared body of water receiving this discharge is the "Mells Stream"
This station discharged sewage 3 time(s) during 2022.
The station discharged for a total of 12.8 hour(s).
This is around 0 day(s)* or 0.14% of the year.

98.9 | 95.4 hours
This monitor was operational for 98.9% of the year.
Leaving 95.4 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
OperatorWessex Water
Primary Permit #011557
Secondary Permit #13229S

2021
Mells Stream | 3 Spills |
11.3 hours | 0.12

The declared body of water receiving this discharge is the "Mells Stream"
This station discharged sewage 3 time(s) during 2021.
The station discharged for a total of 11.3 hour(s).
This is around 0 day(s)* or 0.12% of the year.

98.9 | 96.3 hours
This monitor was operational for 98.9% of the year.
Leaving 96.3 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
OperatorWessex Water
Primary Permit #11557
Secondary Permit #13229S


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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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