Holyhead Strait at Four Mile Bridge SPS Holyhead
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
2088.2 hours | 7.94
The declared body of water receiving this discharge is the "Holyhead Strait"
This station has discharged sewage 143 time(s).
The station has discharged for a total of 2088.2 hour(s).
This is 7.94% of the time which we have data for.
In total: 87 day(s)* of elapsed time.
99.6 | 87.5 hours
This monitor has been operational for 99.6% of its total time we have data for.
There are 87.59 hours unaccounted for due to downtime of the monitor.
The worst year in our records for the "Four Mile Bridge SPS Holyhead" is 2021, discharging sewage for 901.7 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
698.7 hours | 7.97
The declared body of water receiving this discharge is the "Holyhead Strait"
This station discharged sewage 48 time(s) during 2023.
The station discharged for a total of 698.7 hour(s).
This is around 29 day(s)* or 7.97% 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 # | CG0146801 |
| Secondary Permit # | CG0146801 |
2022
487.7 hours | 5.56
The declared body of water receiving this discharge is the "Holyhead Strait"
This station discharged sewage 35 time(s) during 2022.
The station discharged for a total of 487.7 hour(s).
This is around 20 day(s)* or 5.56% of the year.
100 | 0 hours
This monitor was operational for 100% of the year.
Leaving 0 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 # | CG0146801 |
| Secondary Permit # | CG0146801 |
2021
901.7 hours | 10.29
The declared body of water receiving this discharge is the "Holyhead Strait"
This station discharged sewage 60 time(s) during 2021.
The station discharged for a total of 901.7 hour(s).
This is around 37 day(s)* or 10.29% of the year.
100 | 0 hours
This monitor was operational for 100% of the year.
Leaving 0 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 # | CG0146801 |
| Secondary Permit # | CG0146801 |
FloodMapper is not affiliated with this monitoring stations operator(s) or any other entities that may be mentioned on this page.
All trademarks and registered trademarks are the property of their respective owners.
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
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
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
FloodMapper is an independent site and is not associated with any government bodies (e.g. Environment Agency).
Copyright © FloodMapper 2023-2024.
All Rights Reserved