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
Conwy Bay | 465 Spills | 7133.2 hours | 27.14
The declared body of water receiving this discharge is the "Conwy Bay" This station has discharged sewage 465 time(s). The station has discharged for a total of 7133.2 hour(s). This is 27.14% of the time which we have data for. In total: 297 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 "Penmaenmawr WWTW Penmaenmawr" is 2023, discharging sewage for 3080.5 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
Conwy Bay | 185 Spills | 3080.5 hours | 35.16 The declared body of water receiving this discharge is the "Conwy Bay" This station discharged sewage 185 time(s) during 2023. The station discharged for a total of 3080.5 hour(s). This is around 128 day(s)* or 35.16% of the year.
99.9 | 1.7 hours This monitor was operational for 99.9% of the year. Leaving 1.7 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 #
CG0393801
Secondary Permit #
CG0393801
2022
Conwy Bay | 105 Spills | 1478.7 hours | 16.88 The declared body of water receiving this discharge is the "Conwy Bay" This station discharged sewage 105 time(s) during 2022. The station discharged for a total of 1478.7 hour(s). This is around 61 day(s)* or 16.88% 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 #
CG0393801
Secondary Permit #
CG0393801
2021
Coastal Waters Of Conwy Bay | 175 Spills | 2574 hours | 29.38 The declared body of water receiving this discharge is the "Coastal Waters Of Conwy Bay" This station discharged sewage 175 time(s) during 2021. The station discharged for a total of 2574 hour(s). This is around 107 day(s)* or 29.38% of the year.
99.9 | 3.5 hours This monitor was operational for 99.9% of the year. Leaving 3.5 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 #
CG0393801
Secondary Permit #
CG0393801
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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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