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
Glaslyn | 129 Spills | 54.2 hours | 0.2
The declared body of water receiving this discharge is the "Glaslyn" This station has discharged sewage 129 time(s). The station has discharged for a total of 54.2 hour(s). This is 0.2% of the time which we have data for. In total: 2 day(s)* of elapsed time.
83.6 | 4292.3 hours This monitor has been operational for 83.6% of its total time we have data for. There are 4292.39 hours unaccounted for due to downtime of the monitor.
The worst year in our records for the "Porthmadog - Lombard Street Ss" is 2023, discharging sewage for 24.5 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
Glaslyn | 71 Spills | 24.5 hours | 0.27 The declared body of water receiving this discharge is the "Glaslyn" This station discharged sewage 71 time(s) during 2023. The station discharged for a total of 24.5 hour(s). This is around 1 day(s)* or 0.27% of the year.
99.3 | 56.9 hours This monitor was operational for 99.3% of the year. Leaving 56.9 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 #
CG0051801
Secondary Permit #
CG0051801
2022
Note: Data is potentially unreliable in 2022 Due to high unavailability of the monitor
Glaslyn | 39 Spills | 23.2 hours | 0.26 The declared body of water receiving this discharge is the "Glaslyn" This station discharged sewage 39 time(s) during 2022. The station discharged for a total of 23.2 hour(s). This is around 0 day(s)* or 0.26% of the year.
72.9 | 2369.5 hours This monitor was operational for 72.9% of the year. Leaving 2369.5 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 #
CG0051801
Secondary Permit #
CG0051801
2021
Unnamed Stream | 19 Spills | 6.5 hours | 0.07 The declared body of water receiving this discharge is the "Unnamed Stream" This station discharged sewage 19 time(s) during 2021. The station discharged for a total of 6.5 hour(s). This is around 0 day(s)* or 0.07% of the year.
80.5 | 1702 hours This monitor was operational for 80.5% of the year. Leaving 1702 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 #
CG0051801
Secondary Permit #
CG0051801
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