Cynfal at CSO At Llan Ffestiniog Sewage Treatment Works
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
Cynfal | 895 Spills | 8669.5 hours | 32.98
The declared body of water receiving this discharge is the "Cynfal" This station has discharged sewage 895 time(s). The station has discharged for a total of 8669.5 hour(s). This is 32.98% of the time which we have data for. In total: 361 day(s)* of elapsed time.
99.3 | 175.2 hours This monitor has been operational for 99.3% of its total time we have data for. There are 175.2 hours unaccounted for due to downtime of the monitor.
The worst year in our records for the "CSO At Llan Ffestiniog Sewage Treatment Works" is 2023, discharging sewage for 4069.2 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
Cynfal | 317 Spills | 4069.2 hours | 46.45 The declared body of water receiving this discharge is the "Cynfal" This station discharged sewage 317 time(s) during 2023. The station discharged for a total of 4069.2 hour(s). This is around 169 day(s)* or 46.45% of the year.
100 | 0 hours This monitor was operational for 100% of the year. Leaving 0 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 #
CG0058802
Secondary Permit #
CG0058802
2022
Cynfal | 271 Spills | 2010.2 hours | 22.94 The declared body of water receiving this discharge is the "Cynfal" This station discharged sewage 271 time(s) during 2022. The station discharged for a total of 2010.2 hour(s). This is around 83 day(s)* or 22.94% of the year.
99.6 | 33.2 hours This monitor was operational for 99.6% of the year. Leaving 33.2 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 #
CG0058802
Secondary Permit #
CG0058802
2021
Cynfal | 307 Spills | 2590 hours | 29.56 The declared body of water receiving this discharge is the "Cynfal" This station discharged sewage 307 time(s) during 2021. The station discharged for a total of 2590 hour(s). This is around 107 day(s)* or 29.56% of the year.
99.9 | 0.8 hours This monitor was operational for 99.9% of the year. Leaving 0.8 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 #
CG0058802
Secondary Permit #
CG0058802
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Station overseen (meaning either provided, or regulated) by: Natural Resources Wales 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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