Llwyn Onn Water Treatment Works Llwyn Onn Merthyr Tydfil CF48 2HS

Proposal

Upgrade of Llwyn Onn Water Treatment Works, including new buildings, underground pipelines and other associated infrastructure; demolition of redundant buildings; engineering works; landscaping and other minor works across the Llwyn-onn Water Treatement Works and Cantref Water Treatment Works area.

Key dates

1. Started30 October 2026
2. Consulted9 December 2026

Official record