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

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