River Basins Sketty Green CSO
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Swansea Bay at Sketty Green CSO

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
Swansea Bay | 59 Spills |
275.5 hours | 1.04


The declared body of water receiving this discharge is the "Swansea Bay"
This station has discharged sewage 59 time(s).
The station has discharged for a total of 275.5 hour(s).
This is 1.04% of the time which we have data for.
In total: 11 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 "Sketty Green CSO" is 2021, discharging sewage for 109 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
Swansea Bay | 13 Spills |
64.2 hours | 0.73

The declared body of water receiving this discharge is the "Swansea Bay"
This station discharged sewage 13 time(s) during 2023.
The station discharged for a total of 64.2 hour(s).
This is around 2 day(s)* or 0.73% of the year.

99.8 | 11.3 hours
This monitor was operational for 99.8% of the year.
Leaving 11.3 hours unaccounted for in the data.


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

Permit & Governance

AttributeValue
Governing BodyNatural Resources Wales
OperatorDwr Cymru Welsh Water
Primary Permit #AB3694FF
Secondary Permit #AB3694FF

2022
Swansea Bay | 25 Spills |
102.2 hours | 1.16

The declared body of water receiving this discharge is the "Swansea Bay"
This station discharged sewage 25 time(s) during 2022.
The station discharged for a total of 102.2 hour(s).
This is around 4 day(s)* or 1.16% of the year.

96.7 | 284.7 hours
This monitor was operational for 96.7% of the year.
Leaving 284.7 hours unaccounted for in the data.


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

Permit & Governance

AttributeValue
Governing BodyNatural Resources Wales
OperatorDwr Cymru Welsh Water
Primary Permit #AB3694FF
Secondary Permit #AB3694FF

2021
Swansea Bay | 21 Spills |
109 hours | 1.24

The declared body of water receiving this discharge is the "Swansea Bay"
This station discharged sewage 21 time(s) during 2021.
The station discharged for a total of 109 hour(s).
This is around 4 day(s)* or 1.24% of the year.

99.4 | 47.3 hours
This monitor was operational for 99.4% of the year.
Leaving 47.3 hours unaccounted for in the data.


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

Permit & Governance

AttributeValue
Governing BodyNatural Resources Wales
OperatorDwr Cymru Welsh Water
Primary Permit #AB3694FF
Secondary Permit #AB3694FF


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Local Information
Station Data Information
Station overseen (meaning either provided, or regulated) by: Natural Resources Wales
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