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Ogwen - Lower at CSO At Maes Bleddyn

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
Ogwen - Lower | 170 Spills |
602.2 hours | 2.29


The declared body of water receiving this discharge is the "Ogwen - Lower"
This station has discharged sewage 170 time(s).
The station has discharged for a total of 602.2 hour(s).
This is 2.29% of the time which we have data for.
In total: 25 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 At Maes Bleddyn" is 2021, discharging sewage for 431.5 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
Ogwen - Lower | 61 Spills |
117.2 hours | 1.33

The declared body of water receiving this discharge is the "Ogwen - Lower"
This station discharged sewage 61 time(s) during 2023.
The station discharged for a total of 117.2 hour(s).
This is around 4 day(s)* or 1.33% of the year.

99.5 | 41.1 hours
This monitor was operational for 99.5% of the year.
Leaving 41.1 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 #MP3328XV
Secondary Permit #MP3328XV

2022
Ogwen - Lower | 41 Spills |
53.5 hours | 0.61

The declared body of water receiving this discharge is the "Ogwen - Lower"
This station discharged sewage 41 time(s) during 2022.
The station discharged for a total of 53.5 hour(s).
This is around 2 day(s)* or 0.61% of the year.

99.7 | 18.3 hours
This monitor was operational for 99.7% of the year.
Leaving 18.3 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 #MP3328XV
Secondary Permit #MP3328XV

2021
Trib Of Afon Ogwen | 68 Spills |
431.5 hours | 4.92

The declared body of water receiving this discharge is the "Trib Of Afon Ogwen"
This station discharged sewage 68 time(s) during 2021.
The station discharged for a total of 431.5 hour(s).
This is around 17 day(s)* or 4.92% of the year.

99.5 | 35.9 hours
This monitor was operational for 99.5% of the year.
Leaving 35.9 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 #MP3328XV
Secondary Permit #MP3328XV


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