River Basins Porthmadog - Lombard Street Ss
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Glaslyn at Porthmadog - Lombard Street Ss

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.
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

AttributeValue
Governing BodyNatural Resources Wales
OperatorDwr Cymru Welsh Water
Primary Permit #CG0051801
Secondary Permit #CG0051801

2022
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

AttributeValue
Governing BodyNatural Resources Wales
OperatorDwr 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

AttributeValue
Governing BodyNatural Resources Wales
OperatorDwr Cymru Welsh Water
Primary Permit #CG0051801
Secondary Permit #CG0051801


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Operator comments are presented, unedited, as they were received by us and do not reflect our views or position

Local Information
Station Data Information
Station overseen (meaning either provided, or regulated) by: Natural Resources Wales
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