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River Yeo at Yeovil (Pen Mill) 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
River Yeo | 90 Spills |
657.2 hours | 2.5


The declared body of water receiving this discharge is the "River Yeo"
This station has discharged sewage 90 time(s).
The station has discharged for a total of 657.2 hour(s).
This is 2.5% of the time which we have data for.
In total: 27 day(s)* of elapsed time.

99.6 | 87.5 hours
This monitor has been operational for 99.6% of its total time we have data for.
There are 87.59 hours unaccounted for due to downtime of the monitor.


The worst year in our records for the "Yeovil (Pen Mill) WWTW" is 2023, discharging sewage for 307.8 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 Yeo | 38 Spills |
307.8 hours | 3.51

The declared body of water receiving this discharge is the "River Yeo"
This station discharged sewage 38 time(s) during 2023.
The station discharged for a total of 307.8 hour(s).
This is around 12 day(s)* or 3.51% 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

AttributeValue
Governing BodyThe Environment Agency
OperatorWessex Water
Primary Permit #101331
Secondary Permit #13366S

2022
River Yeo | 29 Spills |
197.4 hours | 2.25

The declared body of water receiving this discharge is the "River Yeo"
This station discharged sewage 29 time(s) during 2022.
The station discharged for a total of 197.4 hour(s).
This is around 8 day(s)* or 2.25% 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

AttributeValue
Governing BodyThe Environment Agency
OperatorWessex Water
Primary Permit #101331
Secondary Permit #13366S

2021
River Yeo | 23 Spills |
152 hours | 1.73

The declared body of water receiving this discharge is the "River Yeo"
This station discharged sewage 23 time(s) during 2021.
The station discharged for a total of 152 hour(s).
This is around 6 day(s)* or 1.73% of the year.

99.9 | 8.7 hours
This monitor was operational for 99.9% of the year.
Leaving 8.7 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 #101331
Secondary Permit #13366S


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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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