Dŵr Cymru Cyfyngedig - St. Nicholas (Nr Bonvilston) Wastewater Treatment Works Off Brook Lane, St Nicholas, Cardiff CF5 6TB

We’ve received an application to vary an environmental permit from Dŵr Cymru Cyfyngedig.

Variation application to an environmental permit under the Environmental Permitting (England and Wales) Regulations 2016

The permit variation application is to increase the Dry Weather Flow from 67m3/day to 111m3/day.

Application number: PAN-025611
Regulated facility type: Wastewater Treatment Works(WwTW)
Regulated facility location: Dŵr Cymru Cyfyngedig
St. Nicholas (Nr Bonvilston) Wastewater Treatment Works
Off Brook Lane,
St Nicholas,
Cardiff
CF5 6TB
NGR discharge point: ST 08809 73089
Receiving environment: The River Weycock
Effluent type: Treated Sewage Effluent 
Volume: 111 cubic metre per day

You can see the application documents free of charge, from our online public register. You can search for the documents using the application details, above. Or you can request a copy of the information from us. This may take time to process and there could be a charge.

If you have any comments send these by 26/11/2025

Email: permittingconsultations@naturalresourceswales.gov.uk

Or write to:

Permitting Service
Natural Resources Wales
Cardiff Cathays Park
Welsh Government Offices 
Cathays Park 
King Edward VII Avenue
Cardiff
CF10 3NQ

We must decide whether to grant or refuse the application. If we grant it, we must decide what conditions to include in the permit. You can find information about how we make decisions in our Public Participation Statement.