River Basins Severn South East Valleys Ely Nant Dowlais - source to conf Ely R Creigiau Sewage Treatment Works Hoel Settled Storm
River Basins . . . Nant Dowlais - source to conf Ely R Creigiau Sewage Treatment Works Hoel Settled Storm
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Nant Dowlais - Source To Conf Ely R at Creigiau Sewage Treatment Works Hoel 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.
Operational Summary - 2021-2023
Nant Dowlais - Source To Conf Ely R | 255 Spills |
4205.2 hours | 16


The declared body of water receiving this discharge is the "Nant Dowlais - Source To Conf Ely R"
This station has discharged sewage 255 time(s).
The station has discharged for a total of 4205.2 hour(s).
This is 16% of the time which we have data for.
In total: 175 day(s)* of elapsed time.

97 | 788.4 hours
This monitor has been operational for 97% of its total time we have data for.
There are 788.4 hours unaccounted for due to downtime of the monitor.


The worst year in our records for the "Creigiau Sewage Treatment Works Hoel Settled Storm" is 2023, discharging sewage for 1931 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
Nant Dowlais - Source To Conf Ely R | 116 Spills |
1931 hours | 22.04

The declared body of water receiving this discharge is the "Nant Dowlais - Source To Conf Ely R"
This station discharged sewage 116 time(s) during 2023.
The station discharged for a total of 1931 hour(s).
This is around 80 day(s)* or 22.04% of the year.

92.7 | 639.4 hours
This monitor was operational for 92.7% of the year.
Leaving 639.4 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 #AF4024801
Secondary Permit #AF4024801

2022
Nant Dowlais - Source To Conf Ely R | 62 Spills |
1043.2 hours | 11.9

The declared body of water receiving this discharge is the "Nant Dowlais - Source To Conf Ely R"
This station discharged sewage 62 time(s) during 2022.
The station discharged for a total of 1043.2 hour(s).
This is around 43 day(s)* or 11.9% 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

AttributeValue
Governing BodyNatural Resources Wales
OperatorDwr Cymru Welsh Water
Primary Permit #AF4024801
Secondary Permit #AF4024801

2021
Nant Dowlais - Source To Conf Ely R | 77 Spills |
1231 hours | 14.05

The declared body of water receiving this discharge is the "Nant Dowlais - Source To Conf Ely R"
This station discharged sewage 77 time(s) during 2021.
The station discharged for a total of 1231 hour(s).
This is around 51 day(s)* or 14.05% of the year.

99.6 | 30.6 hours
This monitor was operational for 99.6% of the year.
Leaving 30.6 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 #AF4024801
Secondary Permit #AF4024801


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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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