Dwyryd - Lower at Gellilydan STW (Settled Storm)
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.
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
3247.5 hours | 12.35
The declared body of water receiving this discharge is the "Dwyryd - Lower"
This station has discharged sewage 349 time(s).
The station has discharged for a total of 3247.5 hour(s).
This is 12.35% of the time which we have data for.
In total: 135 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 "Gellilydan STW (Settled Storm)" is 2023, discharging sewage for 1486.2 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
1486.2 hours | 16.96
The declared body of water receiving this discharge is the "Dwyryd - Lower"
This station discharged sewage 138 time(s) during 2023.
The station discharged for a total of 1486.2 hour(s).
This is around 61 day(s)* or 16.96% of the year.
99.1 | 78.8 hours
This monitor was operational for 99.1% of the year.
Leaving 78.8 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 # | CG0369901 |
| Secondary Permit # | CG0369901 |
2022
801.5 hours | 9.14
The declared body of water receiving this discharge is the "Dwyryd - Lower"
This station discharged sewage 110 time(s) during 2022.
The station discharged for a total of 801.5 hour(s).
This is around 33 day(s)* or 9.14% of the year.
99.5 | 35.9 hours
This monitor was operational for 99.5% of the year.
Leaving 35.9 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 # | CG0369901 |
| Secondary Permit # | CG0369901 |
2021
959.7 hours | 10.95
The declared body of water receiving this discharge is the " Dwyryd - Lower"
This station discharged sewage 101 time(s) during 2021.
The station discharged for a total of 959.7 hour(s).
This is around 39 day(s)* or 10.95% of the year.
99.8 | 9.6 hours
This monitor was operational for 99.8% of the year.
Leaving 9.6 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 # | CG0369901 |
| Secondary Permit # | CG0369901 |
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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
Nearby Flood Warnings
None
Nearby Alert Areas
None
Nearby Stations
No nearby stations
Nearby Sewage Discharge Stations
CSO At Llan Ffestiniog Sewage Treatment Works
CSO At Llanffestiniog STW
Maentwrog CSO
Maentwrog WWTW
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