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Little Mere River at Payhembury STW

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
Little Mere River | 347 Spills |
2540 hours | 9.66


The declared body of water receiving this discharge is the "Little Mere River"
This station has discharged sewage 347 time(s).
The station has discharged for a total of 2540 hour(s).
This is 9.66% of the time which we have data for.
In total: 105 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 "Payhembury STW" is 2023, discharging sewage for 1708.5 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
Little Mere River | 174 Spills |
1708.5 hours | 19.5

The declared body of water receiving this discharge is the "Little Mere River"
This station discharged sewage 174 time(s) during 2023.
The station discharged for a total of 1708.5 hour(s).
This is around 71 day(s)* or 19.5% of the year.

The following reasons have been given for the high spill frequency in 2023:
N/A - Ongoing Investigation

The following comments have been given on the station operators intended actions:
N/A - Ongoing Investigation

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
OperatorSouth West Water
Primary Permit #SWWA 2498
Secondary Permit #SWWA 2498

2022
Payhembury Stream (S) | 78 Spills |
332.2 hours | 3.79

The declared body of water receiving this discharge is the "Payhembury Stream (S)"
This station discharged sewage 78 time(s) during 2022.
The station discharged for a total of 332.2 hour(s).
This is around 13 day(s)* or 3.79% 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

99 | 87.6 hours
This monitor was operational for 99% of the year.
Leaving 87.6 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
OperatorSouth West Water
Primary Permit #SWWA 2498
Secondary Permit #SWWA 2498

2021
Payhembury Stream (S) | 95 Spills |
499.3 hours | 5.7

The declared body of water receiving this discharge is the "Payhembury Stream (S)"
This station discharged sewage 95 time(s) during 2021.
The station discharged for a total of 499.3 hour(s).
This is around 20 day(s)* or 5.7% 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
OperatorSouth West Water
Primary Permit #SWWA 2498
Secondary Permit #SWWA 2498


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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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