Gwyrfai - Downstream Of Cwellyn at Bontnewydd 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
1594.5 hours | 6.06
The declared body of water receiving this discharge is the "Gwyrfai - Downstream Of Cwellyn"
This station has discharged sewage 327 time(s).
The station has discharged for a total of 1594.5 hour(s).
This is 6.06% of the time which we have data for.
In total: 66 day(s)* of elapsed time.
93.3 | 1752 hours
This monitor has been operational for 93.3% of its total time we have data for.
There are 1752 hours unaccounted for due to downtime of the monitor.
The worst year in our records for the "Bontnewydd CSO" is 2021, discharging sewage for 704 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
426 hours | 4.86
The declared body of water receiving this discharge is the "Gwyrfai - Downstream Of Cwellyn"
This station discharged sewage 119 time(s) during 2023.
The station discharged for a total of 426 hour(s).
This is around 17 day(s)* or 4.86% of the year.
97.3 | 233 hours
This monitor was operational for 97.3% of the year.
Leaving 233 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 # | CG0076907 |
| Secondary Permit # | CG0076907 |
2022
464.5 hours | 5.3
The declared body of water receiving this discharge is the "Gwyrfai - Downstream Of Cwellyn"
This station discharged sewage 97 time(s) during 2022.
The station discharged for a total of 464.5 hour(s).
This is around 19 day(s)* or 5.3% of the year.
86.5 | 1181.7 hours
This monitor was operational for 86.5% of the year.
Leaving 1181.7 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 2022:
Telemetry Or Data Archiving Failure / Issue
*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 # | CG0076907 |
| Secondary Permit # | CG0076907 |
2021
704 hours | 8.03
The declared body of water receiving this discharge is the "Gwyrfai"
This station discharged sewage 111 time(s) during 2021.
The station discharged for a total of 704 hour(s).
This is around 29 day(s)* or 8.03% of the year.
97.6 | 202.3 hours
This monitor was operational for 97.6% of the year.
Leaving 202.3 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 # | CG0076907 |
| Secondary Permit # | CG0076907 |
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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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