River Basins CSO And Eo At Abergwyngregyn
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Menai Strait at CSO And Eo At Abergwyngregyn

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
Menai Strait | 81 Spills |
1619.2 hours | 6.16


The declared body of water receiving this discharge is the "Menai Strait"
This station has discharged sewage 81 time(s).
The station has discharged for a total of 1619.2 hour(s).
This is 6.16% of the time which we have data for.
In total: 67 day(s)* of elapsed time.

99 | 262.8 hours
This monitor has been operational for 99% of its total time we have data for.
There are 262.8 hours unaccounted for due to downtime of the monitor.


The worst year in our records for the "CSO And Eo At Abergwyngregyn" is 2021, discharging sewage for 943 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
Menai Strait | 30 Spills |
664.7 hours | 7.58

The declared body of water receiving this discharge is the "Menai Strait"
This station discharged sewage 30 time(s) during 2023.
The station discharged for a total of 664.7 hour(s).
This is around 27 day(s)* or 7.58% of the year.

99.9 | 6.1 hours
This monitor was operational for 99.9% of the year.
Leaving 6.1 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 #CG0113902
Secondary Permit #CG0113902

2022
Menai Strait | 3 Spills |
11.5 hours | 0.13

The declared body of water receiving this discharge is the "Menai Strait"
This station discharged sewage 3 time(s) during 2022.
The station discharged for a total of 11.5 hour(s).
This is around 0 day(s)* or 0.13% of the year.

99.9 | 2.6 hours
This monitor was operational for 99.9% of the year.
Leaving 2.6 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 #CG0113902
Secondary Permit #CG0113902

2021
Menai Strait | 48 Spills |
943 hours | 10.76

The declared body of water receiving this discharge is the "Menai Strait"
This station discharged sewage 48 time(s) during 2021.
The station discharged for a total of 943 hour(s).
This is around 39 day(s)* or 10.76% of the year.

99.8 | 17.5 hours
This monitor was operational for 99.8% of the year.
Leaving 17.5 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 #CG0113902
Secondary Permit #CG0113902


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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
Nearby Flood Warnings
None
Nearby Alert Areas
None
Nearby Stations
No nearby stations
Station Data Information
Station overseen (meaning either provided, or regulated) by: Natural Resources Wales
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