Dŵr Cymru Cyfyngedig - Llwynon Water Treatment Works, Cwmtaf, Merthyr Tydfil, CF48 2HS

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.

Application number: PAN-020689
Regulated facility type: Water Treatment Works
Regulated facility location: Llwynon Water Treatment Works, Cwmtaf, Merthyr Tydfil, CF48 2HS
NGR discharge point: SO 01195 11236 & SO 01185 11200 
Receiving environment: Afon Taf Fawr
Effluent type: Trade effluent (intermittent)
Volume: 9000 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 05 September 2025

Email: permittingconsultations@naturalresourceswales.gov.uk

Or write to:

Permitting Service
Natural Resources Wales
Welsh Government Offices
Cathays Park
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.