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
Caernarfon Bay North | 27 Spills | 187.5 hours | 0.71
The declared body of water receiving this discharge is the "Caernarfon Bay North" This station has discharged sewage 27 time(s). The station has discharged for a total of 187.5 hour(s). This is 0.71% of the time which we have data for. In total: 7 day(s)* of elapsed time.
63.3 | 9635.9 hours This monitor has been operational for 63.3% of its total time we have data for. There are 9635.99 hours unaccounted for due to downtime of the monitor.
The worst year in our records for the "CSO At Rhosneigr SPS" is 2021, discharging sewage for 159.5 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
Note: Data is potentially unreliable in 2023 Due to high unavailability of the monitor
Caernarfon Bay North | 5 Spills | 28 hours | 0.31 The declared body of water receiving this discharge is the "Caernarfon Bay North" This station discharged sewage 5 time(s) during 2023. The station discharged for a total of 28 hour(s). This is around 1 day(s)* or 0.31% of the year.
66 | 2972.2 hours This monitor was operational for 66% of the year. Leaving 2972.2 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 2023: Comms 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 #
CG0144402
Secondary Permit #
CG0144402
2022
Note: Data is potentially unreliable in 2022 Due to high unavailability of the monitor
Caernarfon Bay North | 0 Spills | 0 hours | 0 The declared body of water receiving this discharge is the "Caernarfon Bay North" This station discharged sewage 0 time(s) during 2022. The station discharged for a total of 0 hour(s). This is around 0 day(s)* or 0% of the year.
46 | 4723.3 hours This monitor was operational for 46% of the year. Leaving 4723.3 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: Comms 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 #
CG0144402
Secondary Permit #
CG0144402
2021
Crigyll | 22 Spills | 159.5 hours | 1.82 The declared body of water receiving this discharge is the " Crigyll" This station discharged sewage 22 time(s) during 2021. The station discharged for a total of 159.5 hour(s). This is around 6 day(s)* or 1.82% of the year.
78.7 | 1865 hours This monitor was operational for 78.7% of the year. Leaving 1865 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 - Escalated Through Business As Usual Process For Communications Failures.
*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 #
CG0144402
Secondary Permit #
CG0144402
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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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