Clywedog - Above Black Brook at Gwynfryn 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.
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
3143.7 hours | 11.96
The declared body of water receiving this discharge is the "Clywedog - Above Black Brook"
This station has discharged sewage 292 time(s).
The station has discharged for a total of 3143.7 hour(s).
This is 11.96% of the time which we have data for.
In total: 130 day(s)* of elapsed time.
70.6 | 7708.7 hours
This monitor has been operational for 70.6% of its total time we have data for.
There are 7708.79 hours unaccounted for due to downtime of the monitor.
The worst year in our records for the "Gwynfryn CSO" is 2022, discharging sewage for 1629.2 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
494.5 hours | 5.64
The declared body of water receiving this discharge is the "Clywedog - Above Black Brook"
This station discharged sewage 73 time(s) during 2023.
The station discharged for a total of 494.5 hour(s).
This is around 20 day(s)* or 5.64% of the year.
99.9 | 5.2 hours
This monitor was operational for 99.9% of the year.
Leaving 5.2 hours unaccounted for in the data.
*This is total time in days, not individual days of the year.
Permit & Governance
| Attribute | Value |
|---|---|
| Governing Body | Natural Resources Wales |
| Operator | Dwr Cymru Welsh Water |
| Primary Permit # | CM0072201 |
| Secondary Permit # | CM0072201 |
2022
1629.2 hours | 18.59
The declared body of water receiving this discharge is the "Clywedog - Above Black Brook"
This station discharged sewage 150 time(s) during 2022.
The station discharged for a total of 1629.2 hour(s).
This is around 67 day(s)* or 18.59% of the year.
92.5 | 652.6 hours
This monitor was operational for 92.5% of the year.
Leaving 652.6 hours unaccounted for in the data.
*This is total time in days, not individual days of the year.
Permit & Governance
| Attribute | Value |
|---|---|
| Governing Body | Natural Resources Wales |
| Operator | Dwr Cymru Welsh Water |
| Primary Permit # | CM0072201 |
| Secondary Permit # | CM0072201 |
2021
Note: Data is potentially unreliable in 2021
Due to high unavailability of the monitor
Clywedog - Above Black Brook | 69 Spills | Due to high unavailability of the monitor
1020 hours | 11.64
The declared body of water receiving this discharge is the "Clywedog - Above Black Brook"
This station discharged sewage 69 time(s) during 2021.
The station discharged for a total of 1020 hour(s).
This is around 42 day(s)* or 11.64% of the year.
21.1 | 6911.6 hours
This monitor was operational for 21.1% of the year.
Leaving 6911.6 hours unaccounted for in the data.
This falls below the 90% threshold where a reason should be given
The following reasons have been given for the downtime in 2021:
Communications Issue, Resolved In September 2021.
*This is total time in days, not individual days of the year.
Permit & Governance
| Attribute | Value |
|---|---|
| Governing Body | Natural Resources Wales |
| Operator | Dwr Cymru Welsh Water |
| Primary Permit # | CM0072201 |
| Secondary Permit # | CM0072201 |
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Local Information
Station Data Information
Station overseen (meaning either provided, or regulated) by: Natural Resources Wales
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Please note that FloodMapper does not verify or check the accuracy of the data provided by third parties. The data is used as received from the source. Any underlying errors, inconsistencies, or inaccuracies in the original data will be reflected in the information presented on our platform. Users are advised to exercise their own judgment and caution when using the data for decision-making purposes.
Information about our data sources and licenses can be found
The information displayed here is used under license. We are not affiliated with any governing, or other, bodies. Nor do they necessarily endorse us, or us them.
Please note that FloodMapper does not verify or check the accuracy of the data provided by third parties. The data is used as received from the source. Any underlying errors, inconsistencies, or inaccuracies in the original data will be reflected in the information presented on our platform. Users are advised to exercise their own judgment and caution when using the data for decision-making purposes.
Information about our data sources and licenses can be found
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